72556771341751 has 4 divisors (see below), whose sum is σ = 72597602390992. Its totient is φ = 72515940292512.

The previous prime is 72556771341653. The next prime is 72556771341797. The reversal of 72556771341751 is 15714317765527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72556771341751 - 2¹⁹ = 72556770817463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72556771341751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72556771341151) 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, 20415521955 + ... + 20415525508.

It is an arithmetic number, because the mean of its divisors is an integer number (18149400597748).

Almost surely, 2^{72556771341751} is an apocalyptic number.

72556771341751 is a deficient number, since it is larger than the sum of its proper divisors (40831049241).

72556771341751 is a wasteful number, since it uses less digits than its factorization.

72556771341751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40831049240.

The product of its digits is 43218000, while the sum is 61.

The spelling of 72556771341751 in words is "seventy-two trillion, five hundred fifty-six billion, seven hundred seventy-one million, three hundred forty-one thousand, seven hundred fifty-one".