145890048931 has 16 divisors (see below), whose sum is σ = 160881315840. Its totient is φ = 131188366080.

The previous prime is 145890048847. The next prime is 145890048959. The reversal of 145890048931 is 139840098541.

It is a cyclic number.

It is not a de Polignac number, because 145890048931 - 2⁷ = 145890048803 is a prime.

It is a super-2 number, since 2×145890048931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145890048971) 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, 1968510 + ... + 2041276.

It is an arithmetic number, because the mean of its divisors is an integer number (10055082240).

Almost surely, 2^145890048931 is an apocalyptic number.

145890048931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145890048931 is a deficient number, since it is larger than the sum of its proper divisors (14991266909).

145890048931 is a wasteful number, since it uses less digits than its factorization.

145890048931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74754.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 145890048931 in words is "one hundred forty-five billion, eight hundred ninety million, forty-eight thousand, nine hundred thirty-one".