87261646416 has 40 divisors (see below), whose sum is σ = 257629623744. Its totient is φ = 24931898880.

The previous prime is 87261646379. The next prime is 87261646447. The reversal of 87261646416 is 61464616278.

It is a super-2 number, since 2×87261646416² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129853305 + ... + 129853976.

Almost surely, 2^87261646416 is an apocalyptic number.

It is an amenable number.

87261646416 is an abundant number, since it is smaller than the sum of its proper divisors (170367977328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87261646416 is a wasteful number, since it uses less digits than its factorization.

87261646416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259707299 (or 259707293 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The spelling of 87261646416 in words is "eighty-seven billion, two hundred sixty-one million, six hundred forty-six thousand, four hundred sixteen".