1807117021840 has 80 divisors (see below), whose sum is σ = 4555110798000. Its totient is φ = 662765008896.

The previous prime is 1807117021771. The next prime is 1807117021859. The reversal of 1807117021840 is 481207117081.

It can be written as a sum of positive squares in 8 ways, for example, as 177756678544 + 1629360343296 = 421612^2 + 1276464^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1807117021793 and 1807117021802.

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, 5675955 + ... + 5985874.

It is an arithmetic number, because the mean of its divisors is an integer number (56938884975).

Almost surely, 2^{1807117021840} is an apocalyptic number.

1807117021840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1807117021840 is an abundant number, since it is smaller than the sum of its proper divisors (2747993776160).

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

1807117021840 is a wasteful number, since it uses less digits than its factorization.

1807117021840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11662004 (or 11661998 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 40.

The spelling of 1807117021840 in words is "one trillion, eight hundred seven billion, one hundred seventeen million, twenty-one thousand, eight hundred forty".