394713085111561 has 4 divisors (see below), whose sum is σ = 394713179007124. Its totient is φ = 394712991216000.

The previous prime is 394713085111469. The next prime is 394713085111589. The reversal of 394713085111561 is 165111580317493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 362221591694400 + 32491493417161 = 19032120^2 + 5700131^2 .

It is a cyclic number.

It is not a de Polignac number, because 394713085111561 - 2¹³ = 394713085103369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394713085114561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40331340 + ... + 49153261.

It is an arithmetic number, because the mean of its divisors is an integer number (98678294751781).

Almost surely, 2^{394713085111561} is an apocalyptic number.

It is an amenable number.

394713085111561 is a deficient number, since it is larger than the sum of its proper divisors (93895563).

394713085111561 is an equidigital number, since it uses as much as digits as its factorization.

394713085111561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93895562.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 394713085111561 in words is "three hundred ninety-four trillion, seven hundred thirteen billion, eighty-five million, one hundred eleven thousand, five hundred sixty-one".