615656063989 has 2 divisors, whose sum is σ = 615656063990. Its totient is φ = 615656063988.

The previous prime is 615656063947. The next prime is 615656064019. The reversal of 615656063989 is 989360656516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365471029764 + 250185034225 = 604542^2 + 500185^2 .

It is a cyclic number.

It is not a de Polignac number, because 615656063989 - 2²³ = 615647675381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615656063989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615656063929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307828031994 + 307828031995.

It is an arithmetic number, because the mean of its divisors is an integer number (307828031995).

Almost surely, 2^615656063989 is an apocalyptic number.

It is an amenable number.

615656063989 is a deficient number, since it is larger than the sum of its proper divisors (1).

615656063989 is an equidigital number, since it uses as much as digits as its factorization.

615656063989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62985600, while the sum is 64.

The spelling of 615656063989 in words is "six hundred fifteen billion, six hundred fifty-six million, sixty-three thousand, nine hundred eighty-nine".