72155505706501 has 24 divisors (see below), whose sum is σ = 89418182726880. Its totient is φ = 57886507641312.

The previous prime is 72155505706451. The next prime is 72155505706517. The reversal of 72155505706501 is 10560750555127.

It is not a de Polignac number, because 72155505706501 - 2²⁷ = 72155371488773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72155505706541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 466809646 + ... + 466964191.

It is an arithmetic number, because the mean of its divisors is an integer number (3725757613620).

Almost surely, 2^{72155505706501} is an apocalyptic number.

It is an amenable number.

72155505706501 is a deficient number, since it is larger than the sum of its proper divisors (17262677020379).

72155505706501 is a wasteful number, since it uses less digits than its factorization.

72155505706501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933773953 (or 933773946 counting only the distinct ones).

The product of its (nonzero) digits is 1837500, while the sum is 49.

The spelling of 72155505706501 in words is "seventy-two trillion, one hundred fifty-five billion, five hundred five million, seven hundred six thousand, five hundred one".