86635542780 has 144 divisors (see below), whose sum is σ = 264854894304. Its totient is φ = 22922403840.

The previous prime is 86635542769. The next prime is 86635542811. The reversal of 86635542780 is 8724553668.

86635542780 is a `hidden beast` number, since 8 + 6 + 6 + 3 + 554 + 2 + 7 + 80 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12273012 + ... + 12280068.

Almost surely, 2^86635542780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86635542780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132427447152).

86635542780 is an abundant number, since it is smaller than the sum of its proper divisors (178219351524).

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

86635542780 is a wasteful number, since it uses less digits than its factorization.

86635542780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7596 (or 7591 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 86635542780 in words is "eighty-six billion, six hundred thirty-five million, five hundred forty-two thousand, seven hundred eighty".