72551152266401 has 4 divisors (see below), whose sum is σ = 74094793804032. Its totient is φ = 71007510728772.

The previous prime is 72551152266391. The next prime is 72551152266407. The reversal of 72551152266401 is 10466225115527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72551152266401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1543641537583 = 72551152266401 / (7 + 2 + 5 + 5 + 1 + 1 + 5 + 2 + 2 + 6 + 6 + 4 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72551152266407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771820768745 + ... + 771820768838.

It is an arithmetic number, because the mean of its divisors is an integer number (18523698451008).

Almost surely, 2^{72551152266401} is an apocalyptic number.

It is an amenable number.

72551152266401 is a deficient number, since it is larger than the sum of its proper divisors (1543641537631).

72551152266401 is a wasteful number, since it uses less digits than its factorization.

72551152266401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543641537630.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 72551152266401 in words is "seventy-two trillion, five hundred fifty-one billion, one hundred fifty-two million, two hundred sixty-six thousand, four hundred one".