2156361577040 has 80 divisors (see below), whose sum is σ = 5657914298880. Its totient is φ = 757092456960.

The previous prime is 2156361576997. The next prime is 2156361577043. The reversal of 2156361577040 is 407751636512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156361577043) 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, 42222944 + ... + 42273983.

It is an arithmetic number, because the mean of its divisors is an integer number (70723928736).

Almost surely, 2^{2156361577040} is an apocalyptic number.

2156361577040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156361577040 is an abundant number, since it is smaller than the sum of its proper divisors (3501552721840).

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

2156361577040 is a wasteful number, since it uses less digits than its factorization.

2156361577040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84496980 (or 84496974 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 2156361577040 in words is "two trillion, one hundred fifty-six billion, three hundred sixty-one million, five hundred seventy-seven thousand, forty".