40645725160 has 72 divisors (see below), whose sum is σ = 92547361890. Its totient is φ = 16066008000.

The previous prime is 40645725157. The next prime is 40645725203. The reversal of 40645725160 is 6152754604.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36581152644 + 4064572516 = 191262^2 + 63754^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 161935035 + ... + 161935285.

Almost surely, 2^40645725160 is an apocalyptic number.

40645725160 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40645725160 is an abundant number, since it is smaller than the sum of its proper divisors (51901636730).

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

40645725160 is an equidigital number, since it uses as much as digits as its factorization.

40645725160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

Multiplying 40645725160 by its sum of digits (40), we get a square (1625829006400 = 1275080²).

40645725160 divided by its sum of digits (40) gives a square (1016143129 = 31877²).

The spelling of 40645725160 in words is "forty billion, six hundred forty-five million, seven hundred twenty-five thousand, one hundred sixty".