61245182391 has 32 divisors (see below), whose sum is σ = 85479390720. Its totient is φ = 38931999744.

The previous prime is 61245182357. The next prime is 61245182419. The reversal of 61245182391 is 19328154216.

It is not a de Polignac number, because 61245182391 - 2⁷ = 61245182263 is a prime.

It is a super-2 number, since 2×61245182391² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245182351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54536556 + ... + 54537678.

It is an arithmetic number, because the mean of its divisors is an integer number (2671230960).

Almost surely, 2^61245182391 is an apocalyptic number.

61245182391 is a deficient number, since it is larger than the sum of its proper divisors (24234208329).

61245182391 is a wasteful number, since it uses less digits than its factorization.

61245182391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935.

The product of its digits is 103680, while the sum is 42.

The spelling of 61245182391 in words is "sixty-one billion, two hundred forty-five million, one hundred eighty-two thousand, three hundred ninety-one".