351656243457 has 4 divisors (see below), whose sum is σ = 468874991280. Its totient is φ = 234437495636.

The previous prime is 351656243453. The next prime is 351656243501. The reversal of 351656243457 is 754342656153.

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 a cyclic number.

It is not a de Polignac number, because 351656243457 - 2² = 351656243453 is a prime.

It is a super-2 number, since 2×351656243457² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (351656243453) 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, 58609373907 + ... + 58609373912.

It is an arithmetic number, because the mean of its divisors is an integer number (117218747820).

Almost surely, 2^351656243457 is an apocalyptic number.

It is an amenable number.

351656243457 is a deficient number, since it is larger than the sum of its proper divisors (117218747823).

351656243457 is a wasteful number, since it uses less digits than its factorization.

351656243457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117218747822.

The product of its digits is 9072000, while the sum is 51.

The spelling of 351656243457 in words is "three hundred fifty-one billion, six hundred fifty-six million, two hundred forty-three thousand, four hundred fifty-seven".