2045981943940 has 24 divisors (see below), whose sum is σ = 4687158635712. Its totient is φ = 743993434080.

The previous prime is 2045981943919. The next prime is 2045981943949. The reversal of 2045981943940 is 493491895402.

It is a super-2 number, since 2×2045981943940² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2045981943949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4649958744 + ... + 4649959183.

It is an arithmetic number, because the mean of its divisors is an integer number (195298276488).

Almost surely, 2^{2045981943940} is an apocalyptic number.

2045981943940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045981943940 is an abundant number, since it is smaller than the sum of its proper divisors (2641176691772).

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

2045981943940 is a wasteful number, since it uses less digits than its factorization.

2045981943940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9299917947 (or 9299917945 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 2045981943940 in words is "two trillion, forty-five billion, nine hundred eighty-one million, nine hundred forty-three thousand, nine hundred forty".