72507144816555 has 32 divisors (see below), whose sum is σ = 117235630822464. Its totient is φ = 38262602735616.

The previous prime is 72507144816539. The next prime is 72507144816583. The reversal of 72507144816555 is 55561844170527.

72507144816555 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 72507144816555 - 2⁴ = 72507144816539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54559 + ... + 12042311.

It is an arithmetic number, because the mean of its divisors is an integer number (3663613463202).

Almost surely, 2^{72507144816555} is an apocalyptic number.

72507144816555 is a deficient number, since it is larger than the sum of its proper divisors (44728486005909).

72507144816555 is a wasteful number, since it uses less digits than its factorization.

72507144816555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992015.

The product of its (nonzero) digits is 47040000, while the sum is 60.

The spelling of 72507144816555 in words is "seventy-two trillion, five hundred seven billion, one hundred forty-four million, eight hundred sixteen thousand, five hundred fifty-five".