36549255978 has 48 divisors (see below), whose sum is σ = 87493887936. Its totient is φ = 10967890560.

The previous prime is 36549255929. The next prime is 36549255979. The reversal of 36549255978 is 87955294563.

36549255978 is a `hidden beast` number, since 3 + 6 + 5 + 4 + 9 + 2 + 559 + 78 = 666.

It is a super-2 number, since 2×36549255978² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36549255979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2589528 + ... + 2603603.

It is an arithmetic number, because the mean of its divisors is an integer number (1822789332).

Almost surely, 2^36549255978 is an apocalyptic number.

36549255978 is an abundant number, since it is smaller than the sum of its proper divisors (50944631958).

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

36549255978 is a wasteful number, since it uses less digits than its factorization.

36549255978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5193179 (or 5193176 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 36549255978 in words is "thirty-six billion, five hundred forty-nine million, two hundred fifty-five thousand, nine hundred seventy-eight".