1900809697780 has 48 divisors (see below), whose sum is σ = 4616906474880. Its totient is φ = 643854296448.

The previous prime is 1900809697777. The next prime is 1900809697811. The reversal of 1900809697780 is 877969080091.

It is a super-2 number, since 2×1900809697780² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 81778815 + ... + 81802054.

It is an arithmetic number, because the mean of its divisors is an integer number (96185551560).

Almost surely, 2^{1900809697780} is an apocalyptic number.

1900809697780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1900809697780 is an abundant number, since it is smaller than the sum of its proper divisors (2716096777100).

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

1900809697780 is a wasteful number, since it uses less digits than its factorization.

1900809697780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163580968 (or 163580966 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 64.

The spelling of 1900809697780 in words is "one trillion, nine hundred billion, eight hundred nine million, six hundred ninety-seven thousand, seven hundred eighty".