155457065 has 4 divisors (see below), whose sum is σ = 186548484. Its totient is φ = 124365648.

The previous prime is 155457053. The next prime is 155457073. The reversal of 155457065 is 560754551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560754551 = 7 ⋅80107793.

It can be written as a sum of positive squares in 2 ways, for example, as 58079641 + 97377424 = 7621^2 + 9868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155457065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15545702 + ... + 15545711.

It is an arithmetic number, because the mean of its divisors is an integer number (46637121).

Almost surely, 2^155457065 is an apocalyptic number.

It is an amenable number.

155457065 is a deficient number, since it is larger than the sum of its proper divisors (31091419).

155457065 is an equidigital number, since it uses as much as digits as its factorization.

155457065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31091418.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 155457065 is about 12468.2422578325. The cubic root of 155457065 is about 537.6960193655.

The spelling of 155457065 in words is "one hundred fifty-five million, four hundred fifty-seven thousand, sixty-five".