399220052651 has 32 divisors (see below), whose sum is σ = 461980915200. Its totient is φ = 337925862144.

The previous prime is 399220052633. The next prime is 399220052717. The reversal of 399220052651 is 156250022993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399220052651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399220052251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124637816 + ... + 124641018.

It is an arithmetic number, because the mean of its divisors is an integer number (14436903600).

Almost surely, 2^399220052651 is an apocalyptic number.

399220052651 is a deficient number, since it is larger than the sum of its proper divisors (62760862549).

399220052651 is a wasteful number, since it uses less digits than its factorization.

399220052651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 399220052651 in words is "three hundred ninety-nine billion, two hundred twenty million, fifty-two thousand, six hundred fifty-one".