61264145231 has 2 divisors, whose sum is σ = 61264145232. Its totient is φ = 61264145230.

The previous prime is 61264145227. The next prime is 61264145251. The reversal of 61264145231 is 13254146216.

61264145231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61264145231 - 2² = 61264145227 is a prime.

It is a super-2 number, since 2×61264145231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61264145191 and 61264145200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61264145251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632072615 + 30632072616.

It is an arithmetic number, because the mean of its divisors is an integer number (30632072616).

Almost surely, 2^61264145231 is an apocalyptic number.

61264145231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61264145231 is an equidigital number, since it uses as much as digits as its factorization.

61264145231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The spelling of 61264145231 in words is "sixty-one billion, two hundred sixty-four million, one hundred forty-five thousand, two hundred thirty-one".