1671807793920 has 144 divisors (see below), whose sum is σ = 5824730483712. Its totient is φ = 405286727680.

The previous prime is 1671807793907. The next prime is 1671807793927. The reversal of 1671807793920 is 293977081761.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (1671807793927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19747152 + ... + 19831631.

It is an arithmetic number, because the mean of its divisors is an integer number (40449517248).

Almost surely, 2^{1671807793920} is an apocalyptic number.

1671807793920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1671807793920 is an abundant number, since it is smaller than the sum of its proper divisors (4152922689792).

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

1671807793920 is a wasteful number, since it uses less digits than its factorization.

1671807793920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39578818 (or 39578804 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 60.

The spelling of 1671807793920 in words is "one trillion, six hundred seventy-one billion, eight hundred seven million, seven hundred ninety-three thousand, nine hundred twenty".