61475252939 has 2 divisors, whose sum is σ = 61475252940. Its totient is φ = 61475252938.

The previous prime is 61475252911. The next prime is 61475252947. The reversal of 61475252939 is 93925257416.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61475252939 is a prime.

It is not a weakly prime, because it can be changed into another prime (61475255939) 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, 30737626469 + 30737626470.

It is an arithmetic number, because the mean of its divisors is an integer number (30737626470).

Almost surely, 2^61475252939 is an apocalyptic number.

61475252939 is a deficient number, since it is larger than the sum of its proper divisors (1).

61475252939 is an equidigital number, since it uses as much as digits as its factorization.

61475252939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 53.

The spelling of 61475252939 in words is "sixty-one billion, four hundred seventy-five million, two hundred fifty-two thousand, nine hundred thirty-nine".