87133939648 has 28 divisors (see below), whose sum is σ = 197607328432. Its totient is φ = 37343116800.

The previous prime is 87133939591. The next prime is 87133939649. The reversal of 87133939648 is 84693933178.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87133939649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97247253 + ... + 97248148.

Almost surely, 2^87133939648 is an apocalyptic number.

It is an amenable number.

87133939648 is an abundant number, since it is smaller than the sum of its proper divisors (110473388784).

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

87133939648 is a wasteful number, since it uses less digits than its factorization.

87133939648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194495420 (or 194495410 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The spelling of 87133939648 in words is "eighty-seven billion, one hundred thirty-three million, nine hundred thirty-nine thousand, six hundred forty-eight".