145379456639 has 4 divisors (see below), whose sum is σ = 145386173856. Its totient is φ = 145372739424.

The previous prime is 145379456627. The next prime is 145379456657. The reversal of 145379456639 is 936654973541.

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-145379456639 is a prime.

It is a super-2 number, since 2×145379456639² (a number of 23 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 (145379456609) 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, 3326039 + ... + 3369464.

It is an arithmetic number, because the mean of its divisors is an integer number (36346543464).

Almost surely, 2^145379456639 is an apocalyptic number.

145379456639 is a deficient number, since it is larger than the sum of its proper divisors (6717217).

145379456639 is an equidigital number, since it uses as much as digits as its factorization.

145379456639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717216.

The product of its digits is 73483200, while the sum is 62.

The spelling of 145379456639 in words is "one hundred forty-five billion, three hundred seventy-nine million, four hundred fifty-six thousand, six hundred thirty-nine".