87689647402 has 64 divisors (see below), whose sum is σ = 153176474880. Its totient is φ = 36876902400.

The previous prime is 87689647399. The next prime is 87689647421. The reversal of 87689647402 is 20474698678.

It is a super-2 number, since 2×87689647402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 136801002 + ... + 136801642.

It is an arithmetic number, because the mean of its divisors is an integer number (2393382420).

Almost surely, 2^87689647402 is an apocalyptic number.

87689647402 is a deficient number, since it is larger than the sum of its proper divisors (65486827478).

87689647402 is a wasteful number, since it uses less digits than its factorization.

87689647402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 87689647402 in words is "eighty-seven billion, six hundred eighty-nine million, six hundred forty-seven thousand, four hundred two".