87744606451 has 4 divisors (see below), whose sum is σ = 88435508992. Its totient is φ = 87053703912.

The previous prime is 87744606419. The next prime is 87744606517. The reversal of 87744606451 is 15460644778.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87744606451 - 2⁵ = 87744606419 is a prime.

It is a super-2 number, since 2×87744606451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87744600451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345451080 + ... + 345451333.

It is an arithmetic number, because the mean of its divisors is an integer number (22108877248).

Almost surely, 2^87744606451 is an apocalyptic number.

87744606451 is a deficient number, since it is larger than the sum of its proper divisors (690902541).

87744606451 is a wasteful number, since it uses less digits than its factorization.

87744606451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690902540.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 87744606451 in words is "eighty-seven billion, seven hundred forty-four million, six hundred six thousand, four hundred fifty-one".