40640196976 has 40 divisors (see below), whose sum is σ = 81298368000. Its totient is φ = 19660263360.

The previous prime is 40640196973. The next prime is 40640197027. The reversal of 40640196976 is 67969104604.

It is a super-2 number, since 2×40640196976² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640196973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4309995 + ... + 4319413.

It is an arithmetic number, because the mean of its divisors is an integer number (2032459200).

Almost surely, 2^40640196976 is an apocalyptic number.

It is an amenable number.

40640196976 is an abundant number, since it is smaller than the sum of its proper divisors (40658171024).

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

40640196976 is a wasteful number, since it uses less digits than its factorization.

40640196976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18157 (or 18151 counting only the distinct ones).

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

The spelling of 40640196976 in words is "forty billion, six hundred forty million, one hundred ninety-six thousand, nine hundred seventy-six".