61396156249 has 2 divisors, whose sum is σ = 61396156250. Its totient is φ = 61396156248.

The previous prime is 61396156189. The next prime is 61396156291. The reversal of 61396156249 is 94265169316.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37120958224 + 24275198025 = 192668^2 + 155805^2 .

It is a cyclic number.

It is not a de Polignac number, because 61396156249 - 2¹⁹ = 61395631961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61396156196 and 61396156205.

It is not a weakly prime, because it can be changed into another prime (61396151249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30698078124 + 30698078125.

It is an arithmetic number, because the mean of its divisors is an integer number (30698078125).

Almost surely, 2^61396156249 is an apocalyptic number.

It is an amenable number.

61396156249 is a deficient number, since it is larger than the sum of its proper divisors (1).

61396156249 is an equidigital number, since it uses as much as digits as its factorization.

61396156249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The spelling of 61396156249 in words is "sixty-one billion, three hundred ninety-six million, one hundred fifty-six thousand, two hundred forty-nine".