40636653220 has 12 divisors (see below), whose sum is σ = 85336971804. Its totient is φ = 16254661280.

The previous prime is 40636653217. The next prime is 40636653227. The reversal of 40636653220 is 2235663604.

It can be written as a sum of positive squares in 2 ways, for example, as 17825988196 + 22810665024 = 133514^2 + 151032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40636653220.

It is not an unprimeable number, because it can be changed into a prime (40636653227) 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, 1015916311 + ... + 1015916350.

It is an arithmetic number, because the mean of its divisors is an integer number (7111414317).

Almost surely, 2^40636653220 is an apocalyptic number.

It is an amenable number.

40636653220 is an abundant number, since it is smaller than the sum of its proper divisors (44700318584).

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

40636653220 is a wasteful number, since it uses less digits than its factorization.

40636653220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031832670 (or 2031832668 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 40636653220 in words is "forty billion, six hundred thirty-six million, six hundred fifty-three thousand, two hundred twenty".