1399687137936 has 80 divisors (see below), whose sum is σ = 4023988341120. Its totient is φ = 465822887040.

The previous prime is 1399687137929. The next prime is 1399687137949. The reversal of 1399687137936 is 6397317869931.

1399687137936 is a `hidden beast` number, since 13 + 99 + 68 + 71 + 379 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2294775 + ... + 2839958.

It is an arithmetic number, because the mean of its divisors is an integer number (50299854264).

Almost surely, 2^{1399687137936} is an apocalyptic number.

1399687137936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399687137936 is an abundant number, since it is smaller than the sum of its proper divisors (2624301203184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399687137936 is a wasteful number, since it uses less digits than its factorization.

1399687137936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135381 (or 5135369 counting only the distinct ones).

The product of its digits is 277766496, while the sum is 72.

The spelling of 1399687137936 in words is "one trillion, three hundred ninety-nine billion, six hundred eighty-seven million, one hundred thirty-seven thousand, nine hundred thirty-six".