42491972392 has 8 divisors (see below), whose sum is σ = 79672448250. Its totient is φ = 21245986192.

The previous prime is 42491972351. The next prime is 42491972399. The reversal of 42491972392 is 29327919424.

It can be written as a sum of positive squares in only one way, i.e., 42351170436 + 140801956 = 205794^2 + 11866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42491972399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655748267 + ... + 2655748282.

Almost surely, 2^42491972392 is an apocalyptic number.

It is an amenable number.

42491972392 is a deficient number, since it is larger than the sum of its proper divisors (37180475858).

42491972392 is a wasteful number, since it uses less digits than its factorization.

42491972392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311496555 (or 5311496551 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The spelling of 42491972392 in words is "forty-two billion, four hundred ninety-one million, nine hundred seventy-two thousand, three hundred ninety-two".