99552878764781 has 48 divisors (see below), whose sum is σ = 109572334882560. Its totient is φ = 90393219820800.

The previous prime is 99552878764771. The next prime is 99552878764813. The reversal of 99552878764781 is 18746787825599.

It is a happy number.

It is not a de Polignac number, because 99552878764781 - 2³⁴ = 99535698895597 is a prime.

It is a super-2 number, since 2×99552878764781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99552878764693 and 99552878764702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99552878764721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4964973206 + ... + 4964993256.

It is an arithmetic number, because the mean of its divisors is an integer number (2282756976720).

Almost surely, 2^{99552878764781} is an apocalyptic number.

It is an amenable number.

99552878764781 is a deficient number, since it is larger than the sum of its proper divisors (10019456117779).

99552878764781 is a wasteful number, since it uses less digits than its factorization.

99552878764781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21526 (or 21513 counting only the distinct ones).

The product of its digits is 17069875200, while the sum is 86.

The spelling of 99552878764781 in words is "ninety-nine trillion, five hundred fifty-two billion, eight hundred seventy-eight million, seven hundred sixty-four thousand, seven hundred eighty-one".