36649477578 has 24 divisors (see below), whose sum is σ = 85266132192. Its totient is φ = 10471279224.

The previous prime is 36649477519. The next prime is 36649477597. The reversal of 36649477578 is 87577494663.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62328750 + ... + 62329337.

It is an arithmetic number, because the mean of its divisors is an integer number (3552755508).

Almost surely, 2^36649477578 is an apocalyptic number.

36649477578 is an abundant number, since it is smaller than the sum of its proper divisors (48616654614).

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

36649477578 is a wasteful number, since it uses less digits than its factorization.

36649477578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124658106 (or 124658099 counting only the distinct ones).

The product of its digits is 213373440, while the sum is 66.

The spelling of 36649477578 in words is "thirty-six billion, six hundred forty-nine million, four hundred seventy-seven thousand, five hundred seventy-eight".