87565135402 has 4 divisors (see below), whose sum is σ = 131347703106. Its totient is φ = 43782567700.

The previous prime is 87565135393. The next prime is 87565135421. The reversal of 87565135402 is 20453156578.

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

It can be written as a sum of positive squares in only one way, i.e., 69547710961 + 18017424441 = 263719^2 + 134229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21891283849 + ... + 21891283852.

Almost surely, 2^87565135402 is an apocalyptic number.

87565135402 is a deficient number, since it is larger than the sum of its proper divisors (43782567704).

87565135402 is a wasteful number, since it uses less digits than its factorization.

87565135402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43782567703.

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 87565135402 in words is "eighty-seven billion, five hundred sixty-five million, one hundred thirty-five thousand, four hundred two".