155005160257 has 4 divisors (see below), whose sum is σ = 156539864916. Its totient is φ = 153470455600.

The previous prime is 155005160221. The next prime is 155005160269. The reversal of 155005160257 is 752061500551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125979564096 + 29025596161 = 354936^2 + 170369^2 .

It is a cyclic number.

It is not a de Polignac number, because 155005160257 - 2⁷ = 155005160129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155005160287) 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, 767352178 + ... + 767352379.

It is an arithmetic number, because the mean of its divisors is an integer number (39134966229).

Almost surely, 2^155005160257 is an apocalyptic number.

It is an amenable number.

155005160257 is a deficient number, since it is larger than the sum of its proper divisors (1534704659).

155005160257 is a wasteful number, since it uses less digits than its factorization.

155005160257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534704658.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 155005160257 in words is "one hundred fifty-five billion, five million, one hundred sixty thousand, two hundred fifty-seven".