40245217172 has 24 divisors (see below), whose sum is σ = 76977573120. Its totient is φ = 18327991680.

The previous prime is 40245217153. The next prime is 40245217193. The reversal of 40245217172 is 27171254204.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9543722 + ... + 9547937.

It is an arithmetic number, because the mean of its divisors is an integer number (3207398880).

Almost surely, 2^40245217172 is an apocalyptic number.

It is an amenable number.

40245217172 is a deficient number, since it is larger than the sum of its proper divisors (36732355948).

40245217172 is a wasteful number, since it uses less digits than its factorization.

40245217172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19091711 (or 19091709 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 40245217172 in words is "forty billion, two hundred forty-five million, two hundred seventeen thousand, one hundred seventy-two".