72672400063621 has 4 divisors (see below), whose sum is σ = 72929192996992. Its totient is φ = 72415607130252.

The previous prime is 72672400063573. The next prime is 72672400063631. The reversal of 72672400063621 is 12636000427627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72672400063621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72672400063631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128396466261 + ... + 128396466826.

It is an arithmetic number, because the mean of its divisors is an integer number (18232298249248).

Almost surely, 2^{72672400063621} is an apocalyptic number.

It is an amenable number.

72672400063621 is a deficient number, since it is larger than the sum of its proper divisors (256792933371).

72672400063621 is a wasteful number, since it uses less digits than its factorization.

72672400063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256792933370.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 72672400063621 in words is "seventy-two trillion, six hundred seventy-two billion, four hundred million, sixty-three thousand, six hundred twenty-one".