45390131639 has 4 divisors (see below), whose sum is σ = 45419025720. Its totient is φ = 45361237560.

The previous prime is 45390131623. The next prime is 45390131641. The reversal of 45390131639 is 93613109354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93613109354 = 2 ⋅46806554677.

It is a cyclic number.

It is not a de Polignac number, because 45390131639 - 2⁴ = 45390131623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45390131639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45390131669) 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, 14444684 + ... + 14447825.

It is an arithmetic number, because the mean of its divisors is an integer number (11354756430).

Almost surely, 2^45390131639 is an apocalyptic number.

45390131639 is a deficient number, since it is larger than the sum of its proper divisors (28894081).

45390131639 is a wasteful number, since it uses less digits than its factorization.

45390131639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28894080.

The product of its (nonzero) digits is 262440, while the sum is 44.

The spelling of 45390131639 in words is "forty-five billion, three hundred ninety million, one hundred thirty-one thousand, six hundred thirty-nine".