65431544542 has 32 divisors (see below), whose sum is σ = 121969516032. Its totient is φ = 25633688544.

The previous prime is 65431544513. The next prime is 65431544543. The reversal of 65431544542 is 24544513456.

65431544542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65431544543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726468 + ... + 1763959.

It is an arithmetic number, because the mean of its divisors is an integer number (3811547376).

Almost surely, 2^65431544542 is an apocalyptic number.

65431544542 is a deficient number, since it is larger than the sum of its proper divisors (56537971490).

65431544542 is a wasteful number, since it uses less digits than its factorization.

65431544542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490552.

The product of its digits is 1152000, while the sum is 43.

The spelling of 65431544542 in words is "sixty-five billion, four hundred thirty-one million, five hundred forty-four thousand, five hundred forty-two".