72866742362551 has 8 divisors (see below), whose sum is σ = 77154829929360. Its totient is φ = 68578855751808.

The previous prime is 72866742362489. The next prime is 72866742362569. The reversal of 72866742362551 is 15526324766827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72866742362551 - 2²¹ = 72866740265399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72866742362581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49492161 + ... + 50943178.

It is an arithmetic number, because the mean of its divisors is an integer number (9644353741170).

Almost surely, 2^{72866742362551} is an apocalyptic number.

72866742362551 is a deficient number, since it is larger than the sum of its proper divisors (4288087566809).

72866742362551 is a wasteful number, since it uses less digits than its factorization.

72866742362551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100478033.

The product of its digits is 203212800, while the sum is 64.

The spelling of 72866742362551 in words is "seventy-two trillion, eight hundred sixty-six billion, seven hundred forty-two million, three hundred sixty-two thousand, five hundred fifty-one".