61294552421 has 4 divisors (see below), whose sum is σ = 62333443200. Its totient is φ = 60255661644.

The previous prime is 61294552391. The next prime is 61294552447. The reversal of 61294552421 is 12425549216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61294552421 is a prime.

It is a super-2 number, since 2×61294552421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61294552471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519445301 + ... + 519445418.

It is an arithmetic number, because the mean of its divisors is an integer number (15583360800).

Almost surely, 2^61294552421 is an apocalyptic number.

It is an amenable number.

61294552421 is a deficient number, since it is larger than the sum of its proper divisors (1038890779).

61294552421 is a wasteful number, since it uses less digits than its factorization.

61294552421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038890778.

The product of its digits is 172800, while the sum is 41.

The spelling of 61294552421 in words is "sixty-one billion, two hundred ninety-four million, five hundred fifty-two thousand, four hundred twenty-one".