99772277557 has 16 divisors (see below), whose sum is σ = 107689973440. Its totient is φ = 92150327808.

The previous prime is 99772277533. The next prime is 99772277581. The reversal of 99772277557 is 75577227799.

It is an interprime number because it is at equal distance from previous prime (99772277533) and next prime (99772277581).

It is a cyclic number.

It is not a de Polignac number, because 99772277557 - 2¹¹ = 99772275509 is a prime.

It is a super-2 number, since 2×99772277557² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is the 315868-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99772277492 and 99772277501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99772277597) by changing a digit.

It is a nontrivial repunit in base 315867.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280518 + ... + 527479.

It is an arithmetic number, because the mean of its divisors is an integer number (6730623340).

Almost surely, 2^99772277557 is an apocalyptic number.

99772277557 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

99772277557 is a deficient number, since it is larger than the sum of its proper divisors (7917695883).

99772277557 is a wasteful number, since it uses less digits than its factorization.

99772277557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808180.

The product of its digits is 136136700, while the sum is 67.

The spelling of 99772277557 in words is "ninety-nine billion, seven hundred seventy-two million, two hundred seventy-seven thousand, five hundred fifty-seven".