72142936451 has 2 divisors, whose sum is σ = 72142936452. Its totient is φ = 72142936450.

The previous prime is 72142936423. The next prime is 72142936507. The reversal of 72142936451 is 15463924127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72142936451 is a prime.

It is not a weakly prime, because it can be changed into another prime (72142936421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36071468225 + 36071468226.

It is an arithmetic number, because the mean of its divisors is an integer number (36071468226).

Almost surely, 2^72142936451 is an apocalyptic number.

72142936451 is a deficient number, since it is larger than the sum of its proper divisors (1).

72142936451 is an equidigital number, since it uses as much as digits as its factorization.

72142936451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The spelling of 72142936451 in words is "seventy-two billion, one hundred forty-two million, nine hundred thirty-six thousand, four hundred fifty-one".