655157057 has 4 divisors (see below), whose sum is σ = 657013380. Its totient is φ = 653300736.

The previous prime is 655157053. The next prime is 655157071. The reversal of 655157057 is 750751556.

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 389825536 + 265331521 = 19744^2 + 16289^2 .

It is a cyclic number.

It is not a de Polignac number, because 655157057 - 2² = 655157053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655157053) 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, 927632 + ... + 928337.

It is an arithmetic number, because the mean of its divisors is an integer number (164253345).

Almost surely, 2^655157057 is an apocalyptic number.

It is an amenable number.

655157057 is a deficient number, since it is larger than the sum of its proper divisors (1856323).

655157057 is a wasteful number, since it uses less digits than its factorization.

655157057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856322.

The product of its (nonzero) digits is 183750, while the sum is 41.

The square root of 655157057 is about 25596.0359626252. The cubic root of 655157057 is about 868.5239678888.

The spelling of 655157057 in words is "six hundred fifty-five million, one hundred fifty-seven thousand, fifty-seven".