394148941669 has 16 divisors (see below), whose sum is σ = 456594771456. Its totient is φ = 333262512000.

The previous prime is 394148941633. The next prime is 394148941687. The reversal of 394148941669 is 966149841493.

It is a cyclic number.

It is not a de Polignac number, because 394148941669 - 2¹⁷ = 394148810597 is a prime.

It is a super-2 number, since 2×394148941669² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394148941669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394148941619) 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, 836992 + ... + 1220185.

It is an arithmetic number, because the mean of its divisors is an integer number (28537173216).

Almost surely, 2^394148941669 is an apocalyptic number.

It is an amenable number.

394148941669 is a deficient number, since it is larger than the sum of its proper divisors (62445829787).

394148941669 is a wasteful number, since it uses less digits than its factorization.

394148941669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057556.

The product of its digits is 40310784, while the sum is 64.

The spelling of 394148941669 in words is "three hundred ninety-four billion, one hundred forty-eight million, nine hundred forty-one thousand, six hundred sixty-nine".