145237775747 has 4 divisors (see below), whose sum is σ = 145239275160. Its totient is φ = 145236276336.

The previous prime is 145237775719. The next prime is 145237775791. The reversal of 145237775747 is 747577732541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145237775747 - 2¹⁰ = 145237774723 is a prime.

It is a super-2 number, since 2×145237775747² (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 (145237775717) 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, 593573 + ... + 801750.

It is an arithmetic number, because the mean of its divisors is an integer number (36309818790).

Almost surely, 2^145237775747 is an apocalyptic number.

145237775747 is a deficient number, since it is larger than the sum of its proper divisors (1499413).

145237775747 is a wasteful number, since it uses less digits than its factorization.

145237775747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499412.

The product of its digits is 40336800, while the sum is 59.

The spelling of 145237775747 in words is "one hundred forty-five billion, two hundred thirty-seven million, seven hundred seventy-five thousand, seven hundred forty-seven".