61449275361 has 16 divisors (see below), whose sum is σ = 82720607040. Its totient is φ = 40572618240.

The previous prime is 61449275347. The next prime is 61449275383. The reversal of 61449275361 is 16357294416.

It is not a de Polignac number, because 61449275361 - 2⁹ = 61449274849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61449275361.

It is not an unprimeable number, because it can be changed into a prime (61449274361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379210 + ... + 516428.

It is an arithmetic number, because the mean of its divisors is an integer number (5170037940).

Almost surely, 2^61449275361 is an apocalyptic number.

It is an amenable number.

61449275361 is a deficient number, since it is larger than the sum of its proper divisors (21271331679).

61449275361 is a wasteful number, since it uses less digits than its factorization.

61449275361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138656.

The product of its digits is 1088640, while the sum is 48.

The spelling of 61449275361 in words is "sixty-one billion, four hundred forty-nine million, two hundred seventy-five thousand, three hundred sixty-one".