87561262064 has 80 divisors (see below), whose sum is σ = 172906576128. Its totient is φ = 42950616576.

The previous prime is 87561262001. The next prime is 87561262081. The reversal of 87561262064 is 46026216578.

It is a super-2 number, since 2×87561262064² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90548909 + ... + 90549875.

Almost surely, 2^87561262064 is an apocalyptic number.

It is an amenable number.

87561262064 is a deficient number, since it is larger than the sum of its proper divisors (85345314064).

87561262064 is a wasteful number, since it uses less digits than its factorization.

87561262064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 87561262064 in words is "eighty-seven billion, five hundred sixty-one million, two hundred sixty-two thousand, sixty-four".