40000320556 has 48 divisors (see below), whose sum is σ = 84417016320. Its totient is φ = 16213380480.

The previous prime is 40000320541. The next prime is 40000320593. The reversal of 40000320556 is 65502300004.

It is a super-2 number, since 2×40000320556² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40000320556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291630 + ... + 406261.

It is an arithmetic number, because the mean of its divisors is an integer number (1758687840).

Almost surely, 2^40000320556 is an apocalyptic number.

40000320556 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

40000320556 is an abundant number, since it is smaller than the sum of its proper divisors (44416695764).

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

40000320556 is a wasteful number, since it uses less digits than its factorization.

40000320556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698014 (or 698012 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 40000320556 in words is "forty billion, three hundred twenty thousand, five hundred fifty-six".