2645837751440 has 80 divisors (see below), whose sum is σ = 6654478752768. Its totient is φ = 972543794688.

The previous prime is 2645837751397. The next prime is 2645837751499. The reversal of 2645837751440 is 441577385462.

It is a happy number.

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

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, 5472284 + ... + 5936123.

Almost surely, 2^{2645837751440} is an apocalyptic number.

2645837751440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2645837751440 is an abundant number, since it is smaller than the sum of its proper divisors (4008641001328).

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

2645837751440 is a wasteful number, since it uses less digits than its factorization.

2645837751440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11408656 (or 11408650 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 56.

The spelling of 2645837751440 in words is "two trillion, six hundred forty-five billion, eight hundred thirty-seven million, seven hundred fifty-one thousand, four hundred forty".