72764444407 has 2 divisors, whose sum is σ = 72764444408. Its totient is φ = 72764444406.

The previous prime is 72764444321. The next prime is 72764444413. The reversal of 72764444407 is 70444446727.

It is a strong prime.

It is an emirp because it is prime and its reverse (70444446727) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72764444407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72764444437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36382222203 + 36382222204.

It is an arithmetic number, because the mean of its divisors is an integer number (36382222204).

Almost surely, 2^72764444407 is an apocalyptic number.

72764444407 is a deficient number, since it is larger than the sum of its proper divisors (1).

72764444407 is an equidigital number, since it uses as much as digits as its factorization.

72764444407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4214784, while the sum is 49.

The spelling of 72764444407 in words is "seventy-two billion, seven hundred sixty-four million, four hundred forty-four thousand, four hundred seven".