615902800061 has 2 divisors, whose sum is σ = 615902800062. Its totient is φ = 615902800060.

The previous prime is 615902800057. The next prime is 615902800063. The reversal of 615902800061 is 160008209516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329469112036 + 286433688025 = 573994^2 + 535195^2 .

It is a cyclic number.

It is not a de Polignac number, because 615902800061 - 2² = 615902800057 is a prime.

Together with 615902800063, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 615902799988 and 615902800024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615902800063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307951400030 + 307951400031.

It is an arithmetic number, because the mean of its divisors is an integer number (307951400031).

Almost surely, 2^615902800061 is an apocalyptic number.

It is an amenable number.

615902800061 is a deficient number, since it is larger than the sum of its proper divisors (1).

615902800061 is an equidigital number, since it uses as much as digits as its factorization.

615902800061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 615902800061 in words is "six hundred fifteen billion, nine hundred two million, eight hundred thousand, sixty-one".