399882958649 has 16 divisors (see below), whose sum is σ = 413323921920. Its totient is φ = 386476272000.

The previous prime is 399882958621. The next prime is 399882958661. The reversal of 399882958649 is 946859288993.

It is a cyclic number.

It is not a de Polignac number, because 399882958649 - 2²⁰ = 399881910073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399882952649) 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, 136059422 + ... + 136062360.

It is an arithmetic number, because the mean of its divisors is an integer number (25832745120).

Almost surely, 2^399882958649 is an apocalyptic number.

It is an amenable number.

399882958649 is a deficient number, since it is larger than the sum of its proper divisors (13440963271).

399882958649 is a wasteful number, since it uses less digits than its factorization.

399882958649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232.

The product of its digits is 2418647040, while the sum is 80.

It can be divided in two parts, 399882 and 958649, that added together give a palindrome (1358531).

The spelling of 399882958649 in words is "three hundred ninety-nine billion, eight hundred eighty-two million, nine hundred fifty-eight thousand, six hundred forty-nine".