1656813378000 has 160 divisors (see below), whose sum is σ = 5827163501952. Its totient is φ = 401651712000.

The previous prime is 1656813377981. The next prime is 1656813378023. The reversal of 1656813378000 is 8733186561.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12485617 + ... + 12617616.

Almost surely, 2^{1656813378000} is an apocalyptic number.

1656813378000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656813378000 is an abundant number, since it is smaller than the sum of its proper divisors (4170350123952).

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

1656813378000 is a wasteful number, since it uses less digits than its factorization.

1656813378000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25103270 (or 25103254 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1656813378000 in words is "one trillion, six hundred fifty-six billion, eight hundred thirteen million, three hundred seventy-eight thousand".