61369931479 has 4 divisors (see below), whose sum is σ = 63349606720. Its totient is φ = 59390256240.

The previous prime is 61369931471. The next prime is 61369931527. The reversal of 61369931479 is 97413996316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61369931479 - 2³ = 61369931471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61369931471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989837574 + ... + 989837635.

It is an arithmetic number, because the mean of its divisors is an integer number (15837401680).

Almost surely, 2^61369931479 is an apocalyptic number.

61369931479 is a deficient number, since it is larger than the sum of its proper divisors (1979675241).

61369931479 is a wasteful number, since it uses less digits than its factorization.

61369931479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979675240.

The product of its digits is 6613488, while the sum is 58.

The spelling of 61369931479 in words is "sixty-one billion, three hundred sixty-nine million, nine hundred thirty-one thousand, four hundred seventy-nine".