40620644154 has 20 divisors (see below), whose sum is σ = 91020332634. Its totient is φ = 13540214664.

The previous prime is 40620644123. The next prime is 40620644161. The reversal of 40620644154 is 45144602604.

40620644154 is a `hidden beast` number, since 4 + 0 + 6 + 2 + 0 + 644 + 1 + 5 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39938024025 + 682620129 = 199845^2 + 26127^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125372197 + ... + 125372520.

Almost surely, 2^40620644154 is an apocalyptic number.

40620644154 is an abundant number, since it is smaller than the sum of its proper divisors (50399688480).

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

40620644154 is a wasteful number, since it uses less digits than its factorization.

40620644154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250744731 (or 250744722 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 40620644154 in words is "forty billion, six hundred twenty million, six hundred forty-four thousand, one hundred fifty-four".