657157602217427 has 16 divisors (see below), whose sum is σ = 672813884476800. Its totient is φ = 641518397520000.

The previous prime is 657157602217379. The next prime is 657157602217429. The reversal of 657157602217427 is 724712206751756.

It is a cyclic number.

It is not a de Polignac number, because 657157602217427 - 2¹⁴ = 657157602201043 is a prime.

It is a super-2 number, since 2×657157602217427² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 657157602217427.

It is not an unprimeable number, because it can be changed into a prime (657157602217429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565441352 + ... + 566602362.

It is an arithmetic number, because the mean of its divisors is an integer number (42050867779800).

Almost surely, 2^{657157602217427} is an apocalyptic number.

657157602217427 is a deficient number, since it is larger than the sum of its proper divisors (15656282259373).

657157602217427 is a wasteful number, since it uses less digits than its factorization.

657157602217427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168354.

The product of its (nonzero) digits is 69148800, while the sum is 62.

The spelling of 657157602217427 in words is "six hundred fifty-seven trillion, one hundred fifty-seven billion, six hundred two million, two hundred seventeen thousand, four hundred twenty-seven".