72157725426503 has 2 divisors, whose sum is σ = 72157725426504. Its totient is φ = 72157725426502.

The previous prime is 72157725426499. The next prime is 72157725426539. The reversal of 72157725426503 is 30562452775127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72157725426503 - 2² = 72157725426499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72157725446503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36078862713251 + 36078862713252.

It is an arithmetic number, because the mean of its divisors is an integer number (36078862713252).

Almost surely, 2^{72157725426503} is an apocalyptic number.

72157725426503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72157725426503 is an equidigital number, since it uses as much as digits as its factorization.

72157725426503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696000, while the sum is 56.

The spelling of 72157725426503 in words is "seventy-two trillion, one hundred fifty-seven billion, seven hundred twenty-five million, four hundred twenty-six thousand, five hundred three".