99479997769157 has 8 divisors (see below), whose sum is σ = 100072535909016. Its totient is φ = 98888254451712.

The previous prime is 99479997769079. The next prime is 99479997769177. The reversal of 99479997769157 is 75196779997499.

It is a Cunningham number, because it is equal to 9973966²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 19535816564356 + 79944181204801 = 4419934^2 + 8941151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99479997769157 - 2¹² = 99479997765061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99479997769177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198454538 + ... + 198955179.

It is an arithmetic number, because the mean of its divisors is an integer number (12509066988627).

Almost surely, 2^{99479997769157} is an apocalyptic number.

It is an amenable number.

99479997769157 is a deficient number, since it is larger than the sum of its proper divisors (592538139859).

99479997769157 is a wasteful number, since it uses less digits than its factorization.

99479997769157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397411207.

The product of its digits is 153118780920, while the sum is 98.

The spelling of 99479997769157 in words is "ninety-nine trillion, four hundred seventy-nine billion, nine hundred ninety-seven million, seven hundred sixty-nine thousand, one hundred fifty-seven".