40397797212 has 48 divisors (see below), whose sum is σ = 94709526912. Its totient is φ = 13402065600.

The previous prime is 40397797211. The next prime is 40397797277. The reversal of 40397797212 is 21279779304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397797211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2574663 + ... + 2590305.

It is an arithmetic number, because the mean of its divisors is an integer number (1973115144).

Almost surely, 2^40397797212 is an apocalyptic number.

It is an amenable number.

40397797212 is an abundant number, since it is smaller than the sum of its proper divisors (54311729700).

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

40397797212 is a wasteful number, since it uses less digits than its factorization.

40397797212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16658 (or 16656 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 40397797212 in words is "forty billion, three hundred ninety-seven million, seven hundred ninety-seven thousand, two hundred twelve".