72401707473644 has 24 divisors (see below), whose sum is σ = 128020003221600. Its totient is φ = 35825544898304.

The previous prime is 72401707473583. The next prime is 72401707473659. The reversal of 72401707473644 is 44637470710427.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72401707473644.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122354744 + ... + 122945055.

It is an arithmetic number, because the mean of its divisors is an integer number (5334166800900).

Almost surely, 2^{72401707473644} is an apocalyptic number.

It is an amenable number.

72401707473644 is a deficient number, since it is larger than the sum of its proper divisors (55618295747956).

72401707473644 is a wasteful number, since it uses less digits than its factorization.

72401707473644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245300569 (or 245300567 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 56.

The spelling of 72401707473644 in words is "seventy-two trillion, four hundred one billion, seven hundred seven million, four hundred seventy-three thousand, six hundred forty-four".