61409567231 has 2 divisors, whose sum is σ = 61409567232. Its totient is φ = 61409567230.

The previous prime is 61409567203. The next prime is 61409567249. The reversal of 61409567231 is 13276590416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61409567231 - 2¹⁴ = 61409550847 is a prime.

It is a super-2 number, since 2×61409567231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61409567431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704783615 + 30704783616.

It is an arithmetic number, because the mean of its divisors is an integer number (30704783616).

Almost surely, 2^61409567231 is an apocalyptic number.

61409567231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61409567231 is an equidigital number, since it uses as much as digits as its factorization.

61409567231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 61409567231 in words is "sixty-one billion, four hundred nine million, five hundred sixty-seven thousand, two hundred thirty-one".