1392091978536 has 512 divisors, whose sum is σ = 4762361856000. Its totient is φ = 368339788800.

The previous prime is 1392091978489. The next prime is 1392091978559. The reversal of 1392091978536 is 6358791902931.

1392091978536 is a `hidden beast` number, since 1 + 3 + 9 + 2 + 0 + 9 + 1 + 97 + 8 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 105783525 + ... + 105796683.

It is an arithmetic number, because the mean of its divisors is an integer number (9301488000).

Almost surely, 2^{1392091978536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392091978536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381180928000).

1392091978536 is an abundant number, since it is smaller than the sum of its proper divisors (3370269877464).

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

1392091978536 is a wasteful number, since it uses less digits than its factorization.

1392091978536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13310 (or 13300 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 1392091978536 in words is "one trillion, three hundred ninety-two billion, ninety-one million, nine hundred seventy-eight thousand, five hundred thirty-six".