72738427292551 has 2 divisors, whose sum is σ = 72738427292552. Its totient is φ = 72738427292550.

The previous prime is 72738427292527. The next prime is 72738427292563. The reversal of 72738427292551 is 15529272483727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72738427292551 - 2³¹ = 72736279808903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72738427292501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36369213646275 + 36369213646276.

It is an arithmetic number, because the mean of its divisors is an integer number (36369213646276).

Almost surely, 2^{72738427292551} is an apocalyptic number.

72738427292551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72738427292551 is an equidigital number, since it uses as much as digits as its factorization.

72738427292551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118540800, while the sum is 64.

The spelling of 72738427292551 in words is "seventy-two trillion, seven hundred thirty-eight billion, four hundred twenty-seven million, two hundred ninety-two thousand, five hundred fifty-one".