40555778992 has 40 divisors (see below), whose sum is σ = 79182432000. Its totient is φ = 20122020672.

The previous prime is 40555778983. The next prime is 40555778999. The reversal of 40555778992 is 29987755504.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40555778992.

It is not an unprimeable number, because it can be changed into a prime (40555778999) 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, 1587859 + ... + 1613197.

It is an arithmetic number, because the mean of its divisors is an integer number (1979560800).

Almost surely, 2^40555778992 is an apocalyptic number.

It is an amenable number.

40555778992 is a deficient number, since it is larger than the sum of its proper divisors (38626653008).

40555778992 is a wasteful number, since it uses less digits than its factorization.

40555778992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26113 (or 26107 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 61.

The spelling of 40555778992 in words is "forty billion, five hundred fifty-five million, seven hundred seventy-eight thousand, nine hundred ninety-two".