399448136401 has 8 divisors (see below), whose sum is σ = 413229251880. Its totient is φ = 385667490432.

The previous prime is 399448136389. The next prime is 399448136411. The reversal of 399448136401 is 104631844993.

It can be written as a sum of positive squares in 4 ways, for example, as 55518669376 + 343929467025 = 235624^2 + 586455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399448136401 - 2²⁷ = 399313918673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399448136411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3344551 + ... + 3461923.

It is an arithmetic number, because the mean of its divisors is an integer number (51653656485).

Almost surely, 2^399448136401 is an apocalyptic number.

It is an amenable number.

399448136401 is a deficient number, since it is larger than the sum of its proper divisors (13781115479).

399448136401 is a wasteful number, since it uses less digits than its factorization.

399448136401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234755.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 399448136401 in words is "three hundred ninety-nine billion, four hundred forty-eight million, one hundred thirty-six thousand, four hundred one".