39645459642 has 32 divisors (see below), whose sum is σ = 79444474560. Its totient is φ = 13189587840.

The previous prime is 39645459613. The next prime is 39645459643. The reversal of 39645459642 is 24695454693.

It is not an unprimeable number, because it can be changed into a prime (39645459643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9857592 + ... + 9861612.

It is an arithmetic number, because the mean of its divisors is an integer number (2482639830).

Almost surely, 2^39645459642 is an apocalyptic number.

39645459642 is an abundant number, since it is smaller than the sum of its proper divisors (39799014918).

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

39645459642 is a wasteful number, since it uses less digits than its factorization.

39645459642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798.

The product of its digits is 27993600, while the sum is 57.

The spelling of 39645459642 in words is "thirty-nine billion, six hundred forty-five million, four hundred fifty-nine thousand, six hundred forty-two".