394611050661 has 16 divisors (see below), whose sum is σ = 561848885760. Its totient is φ = 245808884160.

The previous prime is 394611050657. The next prime is 394611050671. The reversal of 394611050661 is 166050116493.

It is not a de Polignac number, because 394611050661 - 2² = 394611050657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394611050621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73154710 + ... + 73160103.

It is an arithmetic number, because the mean of its divisors is an integer number (35115555360).

Almost surely, 2^394611050661 is an apocalyptic number.

394611050661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

394611050661 is a deficient number, since it is larger than the sum of its proper divisors (167237835099).

394611050661 is a wasteful number, since it uses less digits than its factorization.

394611050661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146314876.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 394611050661 in words is "three hundred ninety-four billion, six hundred eleven million, fifty thousand, six hundred sixty-one".