1978069139136 has 70 divisors (see below), whose sum is σ = 5863616616660. Its totient is φ = 659356377984.

The previous prime is 1978069139113. The next prime is 1978069139153. The reversal of 1978069139136 is 6319319608791.

It is a super-2 number, since 2×1978069139136² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 190780806 + ... + 190791173.

Almost surely, 2^{1978069139136} is an apocalyptic number.

1978069139136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1978069139136 is an abundant number, since it is smaller than the sum of its proper divisors (3885547477524).

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

1978069139136 is an equidigital number, since it uses as much as digits as its factorization.

1978069139136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381572003 (or 381571984 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 1978069139136 in words is "one trillion, nine hundred seventy-eight billion, sixty-nine million, one hundred thirty-nine thousand, one hundred thirty-six".