624625012721 has 2 divisors, whose sum is σ = 624625012722. Its totient is φ = 624625012720.

The previous prime is 624625012643. The next prime is 624625012751. The reversal of 624625012721 is 127210526426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611311314496 + 13313698225 = 781864^2 + 115385^2 .

It is a cyclic number.

It is not a de Polignac number, because 624625012721 - 2²⁶ = 624557903857 is a prime.

It is not a weakly prime, because it can be changed into another prime (624625012751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312312506360 + 312312506361.

It is an arithmetic number, because the mean of its divisors is an integer number (312312506361).

Almost surely, 2^624625012721 is an apocalyptic number.

It is an amenable number.

624625012721 is a deficient number, since it is larger than the sum of its proper divisors (1).

624625012721 is an equidigital number, since it uses as much as digits as its factorization.

624625012721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 624625012721 in words is "six hundred twenty-four billion, six hundred twenty-five million, twelve thousand, seven hundred twenty-one".