61136466431 has 4 divisors (see below), whose sum is σ = 61139636712. Its totient is φ = 61133296152.

The previous prime is 61136466409. The next prime is 61136466463. The reversal of 61136466431 is 13466463116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61136466431 is a prime.

It is a super-2 number, since 2×61136466431² (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 (61136466731) 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, 1556036 + ... + 1594841.

It is an arithmetic number, because the mean of its divisors is an integer number (15284909178).

Almost surely, 2^61136466431 is an apocalyptic number.

61136466431 is a deficient number, since it is larger than the sum of its proper divisors (3170281).

61136466431 is a wasteful number, since it uses less digits than its factorization.

61136466431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170280.

The product of its digits is 186624, while the sum is 41.

The spelling of 61136466431 in words is "sixty-one billion, one hundred thirty-six million, four hundred sixty-six thousand, four hundred thirty-one".