1920673272640 has 28 divisors (see below), whose sum is σ = 4573603231236. Its totient is φ = 768269308928.

The previous prime is 1920673272619. The next prime is 1920673272647. The reversal of 1920673272640 is 462723760291.

It can be written as a sum of positive squares in 2 ways, for example, as 1368600496384 + 552072776256 = 1169872^2 + 743016^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920673272647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001051669 + ... + 3001052308.

Almost surely, 2^{1920673272640} is an apocalyptic number.

1920673272640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920673272640 is an abundant number, since it is smaller than the sum of its proper divisors (2652929958596).

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

1920673272640 is an equidigital number, since it uses as much as digits as its factorization.

1920673272640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002103994 (or 6002103984 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 1920673272640 in words is "one trillion, nine hundred twenty billion, six hundred seventy-three million, two hundred seventy-two thousand, six hundred forty".