399701683318648 has 8 divisors (see below), whose sum is σ = 749440656222480. Its totient is φ = 199850841659320.

The previous prime is 399701683318603. The next prime is 399701683318673. The reversal of 399701683318648 is 846813386107993.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×399701683318648² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24981355207408 + ... + 24981355207423.

It is an arithmetic number, because the mean of its divisors is an integer number (93680082027810).

Almost surely, 2^{399701683318648} is an apocalyptic number.

It is an amenable number.

399701683318648 is a deficient number, since it is larger than the sum of its proper divisors (349738972903832).

399701683318648 is a wasteful number, since it uses less digits than its factorization.

399701683318648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49962710414837 (or 49962710414833 counting only the distinct ones).

The product of its (nonzero) digits is 1128701952, while the sum is 76.

The spelling of 399701683318648 in words is "three hundred ninety-nine trillion, seven hundred one billion, six hundred eighty-three million, three hundred eighteen thousand, six hundred forty-eight".