394668153953 has 4 divisors (see below), whose sum is σ = 397031436480. Its totient is φ = 392304871428.

The previous prime is 394668153949. The next prime is 394668153961. The reversal of 394668153953 is 359351866493.

It is a happy number.

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 394668153953 - 2² = 394668153949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394668153973) 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, 1181641013 + ... + 1181641346.

It is an arithmetic number, because the mean of its divisors is an integer number (99257859120).

Almost surely, 2^394668153953 is an apocalyptic number.

It is an amenable number.

394668153953 is a deficient number, since it is larger than the sum of its proper divisors (2363282527).

394668153953 is a wasteful number, since it uses less digits than its factorization.

394668153953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363282526.

The product of its digits is 62985600, while the sum is 62.

The spelling of 394668153953 in words is "three hundred ninety-four billion, six hundred sixty-eight million, one hundred fifty-three thousand, nine hundred fifty-three".