72400665764046 has 32 divisors (see below), whose sum is σ = 144821668327200. Its totient is φ = 24130166080640.

The previous prime is 72400665764041. The next prime is 72400665764071. The reversal of 72400665764046 is 64046756600427.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72400665764041) 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, 2321932576 + ... + 2321963756.

It is an arithmetic number, because the mean of its divisors is an integer number (4525677135225).

Almost surely, 2^{72400665764046} is an apocalyptic number.

72400665764046 is an abundant number, since it is smaller than the sum of its proper divisors (72421002563154).

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

72400665764046 is a wasteful number, since it uses less digits than its factorization.

72400665764046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73124.

The product of its (nonzero) digits is 40642560, while the sum is 57.

The spelling of 72400665764046 in words is "seventy-two trillion, four hundred billion, six hundred sixty-five million, seven hundred sixty-four thousand, forty-six".