1980181907 has 16 divisors (see below), whose sum is σ = 2180304000. Its totient is φ = 1783467840.

The previous prime is 1980181891. The next prime is 1980181909. The reversal of 1980181907 is 7091810891.

It is not a de Polignac number, because 1980181907 - 2⁴ = 1980181891 is a prime.

It is a super-2 number, since 2×1980181907² = 7842240769620313298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980181909) 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, 942344 + ... + 944442.

It is an arithmetic number, because the mean of its divisors is an integer number (136269000).

Almost surely, 2^1980181907 is an apocalyptic number.

1980181907 is a deficient number, since it is larger than the sum of its proper divisors (200122093).

1980181907 is a wasteful number, since it uses less digits than its factorization.

1980181907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 36288, while the sum is 44.

The square root of 1980181907 is about 44499.2349035351. The cubic root of 1980181907 is about 1255.7456893377.

The spelling of 1980181907 in words is "one billion, nine hundred eighty million, one hundred eighty-one thousand, nine hundred seven".