72420371227655 has 32 divisors (see below), whose sum is σ = 96597755020800. Its totient is φ = 51673387409280.

The previous prime is 72420371227651. The next prime is 72420371227669. The reversal of 72420371227655 is 55672217302427.

It is not a de Polignac number, because 72420371227655 - 2² = 72420371227651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 72420371227597 and 72420371227606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420371227651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69145814 + ... + 70185356.

It is an arithmetic number, because the mean of its divisors is an integer number (3018679844400).

Almost surely, 2^{72420371227655} is an apocalyptic number.

72420371227655 is a deficient number, since it is larger than the sum of its proper divisors (24177383793145).

72420371227655 is a wasteful number, since it uses less digits than its factorization.

72420371227655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063511.

The product of its (nonzero) digits is 9878400, while the sum is 53.

The spelling of 72420371227655 in words is "seventy-two trillion, four hundred twenty billion, three hundred seventy-one million, two hundred twenty-seven thousand, six hundred fifty-five".