615596856401 has 2 divisors, whose sum is σ = 615596856402. Its totient is φ = 615596856400.

The previous prime is 615596856397. The next prime is 615596856463. The reversal of 615596856401 is 104658695516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567701971600 + 47894884801 = 753460^2 + 218849^2 .

It is a cyclic number.

It is not a de Polignac number, because 615596856401 - 2² = 615596856397 is a prime.

It is a super-2 number, since 2×615596856401² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (615592856401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307798428200 + 307798428201.

It is an arithmetic number, because the mean of its divisors is an integer number (307798428201).

Almost surely, 2^615596856401 is an apocalyptic number.

It is an amenable number.

615596856401 is a deficient number, since it is larger than the sum of its proper divisors (1).

615596856401 is an equidigital number, since it uses as much as digits as its factorization.

615596856401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 615596856401 in words is "six hundred fifteen billion, five hundred ninety-six million, eight hundred fifty-six thousand, four hundred one".