1393877387601 has 6 divisors (see below), whose sum is σ = 2013378448770. Its totient is φ = 929251591728.

The previous prime is 1393877387593. The next prime is 1393877387629. The reversal of 1393877387601 is 1067837783931.

1393877387601 is a `hidden beast` number, since 13 + 9 + 3 + 8 + 7 + 7 + 3 + 8 + 7 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 816465852225 + 577411535376 = 903585^2 + 759876^2 .

It is not a de Polignac number, because 1393877387601 - 2³ = 1393877387593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1393877387701) 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, 77437632636 + ... + 77437632653.

It is an arithmetic number, because the mean of its divisors is an integer number (335563074795).

Almost surely, 2^{1393877387601} is an apocalyptic number.

It is an amenable number.

1393877387601 is a deficient number, since it is larger than the sum of its proper divisors (619501061169).

1393877387601 is a wasteful number, since it uses less digits than its factorization.

1393877387601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154875265295 (or 154875265292 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 1393877387601 in words is "one trillion, three hundred ninety-three billion, eight hundred seventy-seven million, three hundred eighty-seven thousand, six hundred one".