61431165734 has 4 divisors (see below), whose sum is σ = 92146748604. Its totient is φ = 30715582866.

The previous prime is 61431165703. The next prime is 61431165737. The reversal of 61431165734 is 43756113416.

61431165734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 61431165691 and 61431165700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61431165737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15357791432 + ... + 15357791435.

It is an arithmetic number, because the mean of its divisors is an integer number (23036687151).

Almost surely, 2^61431165734 is an apocalyptic number.

61431165734 is a deficient number, since it is larger than the sum of its proper divisors (30715582870).

61431165734 is a wasteful number, since it uses less digits than its factorization.

61431165734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30715582869.

The product of its digits is 181440, while the sum is 41.

The spelling of 61431165734 in words is "sixty-one billion, four hundred thirty-one million, one hundred sixty-five thousand, seven hundred thirty-four".