72420371227645 has 16 divisors (see below), whose sum is σ = 99734928468480. Its totient is φ = 49451902020864.

The previous prime is 72420371227613. The next prime is 72420371227651. The reversal of 72420371227645 is 54672217302427.

It is not a de Polignac number, because 72420371227645 - 2⁵ = 72420371227613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72420371227592 and 72420371227601.

It is a congruent number.

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, 4328764572 + ... + 4328781301.

It is an arithmetic number, because the mean of its divisors is an integer number (6233433029280).

Almost surely, 2^{72420371227645} is an apocalyptic number.

It is an amenable number.

72420371227645 is a deficient number, since it is larger than the sum of its proper divisors (27314557240835).

72420371227645 is a wasteful number, since it uses less digits than its factorization.

72420371227645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8657546124.

The product of its (nonzero) digits is 7902720, while the sum is 52.

The spelling of 72420371227645 in words is "seventy-two trillion, four hundred twenty billion, three hundred seventy-one million, two hundred twenty-seven thousand, six hundred forty-five".