61860459669251 has 2 divisors, whose sum is σ = 61860459669252. Its totient is φ = 61860459669250.

The previous prime is 61860459669053. The next prime is 61860459669263. The reversal of 61860459669251 is 15296695406816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61860459669251 is a prime.

It is not a weakly prime, because it can be changed into another prime (61860459669271) 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, 30930229834625 + 30930229834626.

It is an arithmetic number, because the mean of its divisors is an integer number (30930229834626).

Almost surely, 2^{61860459669251} is an apocalyptic number.

61860459669251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61860459669251 is an equidigital number, since it uses as much as digits as its factorization.

61860459669251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 167961600, while the sum is 68.

The spelling of 61860459669251 in words is "sixty-one trillion, eight hundred sixty billion, four hundred fifty-nine million, six hundred sixty-nine thousand, two hundred fifty-one".