87749792451 has 48 divisors (see below), whose sum is σ = 138606249600. Its totient is φ = 55323191808.

The previous prime is 87749792443. The next prime is 87749792461. The reversal of 87749792451 is 15429794778.

87749792451 is a `hidden beast` number, since 8 + 7 + 7 + 4 + 97 + 92 + 451 = 666.

It is not a de Polignac number, because 87749792451 - 2³ = 87749792443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87749792401) 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, 2647540 + ... + 2680478.

It is an arithmetic number, because the mean of its divisors is an integer number (2887630200).

Almost surely, 2^87749792451 is an apocalyptic number.

87749792451 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

87749792451 is a deficient number, since it is larger than the sum of its proper divisors (50856457149).

87749792451 is a wasteful number, since it uses less digits than its factorization.

87749792451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33550 (or 33538 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 87749792451 in words is "eighty-seven billion, seven hundred forty-nine million, seven hundred ninety-two thousand, four hundred fifty-one".