19457285640 has 64 divisors (see below), whose sum is σ = 62862004800. Its totient is φ = 4789485312.

The previous prime is 19457285633. The next prime is 19457285657. The reversal of 19457285640 is 4658275491.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6234750 + ... + 6237869.

It is an arithmetic number, because the mean of its divisors is an integer number (982218825).

Almost surely, 2^19457285640 is an apocalyptic number.

19457285640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19457285640 is an abundant number, since it is smaller than the sum of its proper divisors (43404719160).

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

19457285640 is a wasteful number, since it uses less digits than its factorization.

19457285640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12472646 (or 12472642 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 19457285640 in words is "nineteen billion, four hundred fifty-seven million, two hundred eighty-five thousand, six hundred forty".