61637274401431 has 4 divisors (see below), whose sum is σ = 61644873629664. Its totient is φ = 61629675173200.

The previous prime is 61637274401401. The next prime is 61637274401447. The reversal of 61637274401431 is 13410447273616.

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 61637274401431 - 2¹¹ = 61637274399383 is a prime.

It is a super-2 number, since 2×61637274401431² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61637274401401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3799601950 + ... + 3799618171.

It is an arithmetic number, because the mean of its divisors is an integer number (15411218407416).

Almost surely, 2^{61637274401431} is an apocalyptic number.

61637274401431 is a deficient number, since it is larger than the sum of its proper divisors (7599228233).

61637274401431 is an equidigital number, since it uses as much as digits as its factorization.

61637274401431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7599228232.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 61637274401431 in words is "sixty-one trillion, six hundred thirty-seven billion, two hundred seventy-four million, four hundred one thousand, four hundred thirty-one".