39971563242 has 64 divisors (see below), whose sum is σ = 95120282880. Its totient is φ = 11072185344.

The previous prime is 39971563231. The next prime is 39971563319. The reversal of 39971563242 is 24236517993.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624817 + ... + 685812.

It is an arithmetic number, because the mean of its divisors is an integer number (1486254420).

Almost surely, 2^39971563242 is an apocalyptic number.

39971563242 is an abundant number, since it is smaller than the sum of its proper divisors (55148719638).

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

39971563242 is a wasteful number, since it uses less digits than its factorization.

39971563242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310687.

The product of its digits is 2449440, while the sum is 51.

The spelling of 39971563242 in words is "thirty-nine billion, nine hundred seventy-one million, five hundred sixty-three thousand, two hundred forty-two".