61265215619 has 2 divisors, whose sum is σ = 61265215620. Its totient is φ = 61265215618.

The previous prime is 61265215603. The next prime is 61265215679. The reversal of 61265215619 is 91651256216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61265215619 - 2⁴ = 61265215603 is a prime.

It is a super-2 number, since 2×61265215619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61265215619.

It is not a weakly prime, because it can be changed into another prime (61265215679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632607809 + 30632607810.

It is an arithmetic number, because the mean of its divisors is an integer number (30632607810).

Almost surely, 2^61265215619 is an apocalyptic number.

61265215619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61265215619 is an equidigital number, since it uses as much as digits as its factorization.

61265215619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 44.

The spelling of 61265215619 in words is "sixty-one billion, two hundred sixty-five million, two hundred fifteen thousand, six hundred nineteen".