145515784737 has 4 divisors (see below), whose sum is σ = 194021046320. Its totient is φ = 97010523156.

The previous prime is 145515784723. The next prime is 145515784751. The reversal of 145515784737 is 737487515541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (145515784723) and next prime (145515784751).

It is not a de Polignac number, because 145515784737 - 2¹¹ = 145515782689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145515774737) 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, 24252630787 + ... + 24252630792.

It is an arithmetic number, because the mean of its divisors is an integer number (48505261580).

Almost surely, 2^145515784737 is an apocalyptic number.

It is an amenable number.

145515784737 is a deficient number, since it is larger than the sum of its proper divisors (48505261583).

145515784737 is an equidigital number, since it uses as much as digits as its factorization.

145515784737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48505261582.

The product of its digits is 16464000, while the sum is 57.

The spelling of 145515784737 in words is "one hundred forty-five billion, five hundred fifteen million, seven hundred eighty-four thousand, seven hundred thirty-seven".