87792781872 has 30 divisors (see below), whose sum is σ = 226803323068. Its totient is φ = 29263576352.

The previous prime is 87792781871. The next prime is 87792781877. The reversal of 87792781872 is 27818729778.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87792781871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2031433 + ... + 2074199.

Almost surely, 2^87792781872 is an apocalyptic number.

It is an amenable number.

87792781872 is an abundant number, since it is smaller than the sum of its proper divisors (139010541196).

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

87792781872 is an frugal number, since it uses more digits than its factorization.

87792781872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85545 (or 42772 counting only the distinct ones).

The product of its digits is 44255232, while the sum is 66.

The spelling of 87792781872 in words is "eighty-seven billion, seven hundred ninety-two million, seven hundred eighty-one thousand, eight hundred seventy-two".