61371927431 has 4 divisors (see below), whose sum is σ = 62378024664. Its totient is φ = 60365830200.

The previous prime is 61371927413. The next prime is 61371927473. The reversal of 61371927431 is 13472917316.

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 61371927431 - 2¹⁸ = 61371665287 is a prime.

It is a super-2 number, since 2×61371927431² (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 (61371927481) 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, 503048525 + ... + 503048646.

It is an arithmetic number, because the mean of its divisors is an integer number (15594506166).

Almost surely, 2^61371927431 is an apocalyptic number.

61371927431 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61371927431 is a deficient number, since it is larger than the sum of its proper divisors (1006097233).

61371927431 is a wasteful number, since it uses less digits than its factorization.

61371927431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006097232.

The product of its digits is 190512, while the sum is 44.

The spelling of 61371927431 in words is "sixty-one billion, three hundred seventy-one million, nine hundred twenty-seven thousand, four hundred thirty-one".