61374137369 has 2 divisors, whose sum is σ = 61374137370. Its totient is φ = 61374137368.

The previous prime is 61374137309. The next prime is 61374137389. The reversal of 61374137369 is 96373147316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37805746969 + 23568390400 = 194437^2 + 153520^2 .

It is a cyclic number.

It is not a de Polignac number, because 61374137369 - 2³² = 57079170073 is a prime.

It is a super-2 number, since 2×61374137369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61374137309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30687068684 + 30687068685.

It is an arithmetic number, because the mean of its divisors is an integer number (30687068685).

Almost surely, 2^61374137369 is an apocalyptic number.

It is an amenable number.

61374137369 is a deficient number, since it is larger than the sum of its proper divisors (1).

61374137369 is an equidigital number, since it uses as much as digits as its factorization.

61374137369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 50.

The spelling of 61374137369 in words is "sixty-one billion, three hundred seventy-four million, one hundred thirty-seven thousand, three hundred sixty-nine".