45642138378 has 16 divisors (see below), whose sum is σ = 91294248960. Its totient is φ = 15212384096.

The previous prime is 45642138361. The next prime is 45642138379. The reversal of 45642138378 is 87383124654.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 45642138378.

It is not an unprimeable number, because it can be changed into a prime (45642138379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355338 + ... + 466421.

It is an arithmetic number, because the mean of its divisors is an integer number (5705890560).

Almost surely, 2^45642138378 is an apocalyptic number.

45642138378 is an abundant number, since it is smaller than the sum of its proper divisors (45652110582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45642138378 is a wasteful number, since it uses less digits than its factorization.

45642138378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831021.

The product of its digits is 3870720, while the sum is 51.

The spelling of 45642138378 in words is "forty-five billion, six hundred forty-two million, one hundred thirty-eight thousand, three hundred seventy-eight".