351681263997 has 48 divisors (see below), whose sum is σ = 573663117312. Its totient is φ = 190709497440.

The previous prime is 351681263987. The next prime is 351681264001. The reversal of 351681263997 is 799362186153.

It is not a de Polignac number, because 351681263997 - 2⁴ = 351681263981 is a prime.

It is a super-2 number, since 2×351681263997² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 351681263997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351681263987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19872 + ... + 838902.

It is an arithmetic number, because the mean of its divisors is an integer number (11951314944).

Almost surely, 2^351681263997 is an apocalyptic number.

It is an amenable number.

351681263997 is a deficient number, since it is larger than the sum of its proper divisors (221981853315).

351681263997 is a wasteful number, since it uses less digits than its factorization.

351681263997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819198 (or 819191 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 60.

The spelling of 351681263997 in words is "three hundred fifty-one billion, six hundred eighty-one million, two hundred sixty-three thousand, nine hundred ninety-seven".