145815227657 has 4 divisors (see below), whose sum is σ = 159071157456. Its totient is φ = 132559297860.

The previous prime is 145815227639. The next prime is 145815227731. The reversal of 145815227657 is 756722518541.

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 not a de Polignac number, because 145815227657 - 2¹⁶ = 145815162121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145815227599 and 145815227608.

It is not an unprimeable number, because it can be changed into a prime (145815227057) 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, 6627964883 + ... + 6627964904.

It is an arithmetic number, because the mean of its divisors is an integer number (39767789364).

Almost surely, 2^145815227657 is an apocalyptic number.

It is an amenable number.

145815227657 is a deficient number, since it is larger than the sum of its proper divisors (13255929799).

145815227657 is a wasteful number, since it uses less digits than its factorization.

145815227657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13255929798.

The product of its digits is 4704000, while the sum is 53.

The spelling of 145815227657 in words is "one hundred forty-five billion, eight hundred fifteen million, two hundred twenty-seven thousand, six hundred fifty-seven".