394645037877 has 6 divisors (see below), whose sum is σ = 570042832502. Its totient is φ = 263096691912.

The previous prime is 394645037827. The next prime is 394645037887. The reversal of 394645037877 is 778730546493.

394645037877 is a `hidden beast` number, since 3 + 9 + 46 + 4 + 503 + 7 + 87 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 386972329041 + 7672708836 = 622071^2 + 87594^2 .

It is not a de Polignac number, because 394645037877 - 2¹² = 394645033781 is a prime.

It is a super-3 number, since 3×394645037877³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394645037827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21924724318 + ... + 21924724335.

Almost surely, 2^394645037877 is an apocalyptic number.

It is an amenable number.

394645037877 is a deficient number, since it is larger than the sum of its proper divisors (175397794625).

394645037877 is a wasteful number, since it uses less digits than its factorization.

394645037877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43849448659 (or 43849448656 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 63.

The spelling of 394645037877 in words is "three hundred ninety-four billion, six hundred forty-five million, thirty-seven thousand, eight hundred seventy-seven".