145397791938 has 16 divisors (see below), whose sum is σ = 332337810240. Its totient is φ = 41542226256.

The previous prime is 145397791933. The next prime is 145397791963. The reversal of 145397791938 is 839197793541.

It is a super-2 number, since 2×145397791938² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145397791933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730926053 + ... + 1730926136.

It is an arithmetic number, because the mean of its divisors is an integer number (20771113140).

Almost surely, 2^145397791938 is an apocalyptic number.

145397791938 is an abundant number, since it is smaller than the sum of its proper divisors (186940018302).

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

145397791938 is a wasteful number, since it uses less digits than its factorization.

145397791938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461852201.

The product of its digits is 51438240, while the sum is 66.

The spelling of 145397791938 in words is "one hundred forty-five billion, three hundred ninety-seven million, seven hundred ninety-one thousand, nine hundred thirty-eight".