2156253420707 has 4 divisors (see below), whose sum is σ = 2156643981096. Its totient is φ = 2155862860320.

The previous prime is 2156253420691. The next prime is 2156253420709. The reversal of 2156253420707 is 7070243526512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2156253420707 - 2⁴ = 2156253420691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156253420709) 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, 195271913 + ... + 195282954.

It is an arithmetic number, because the mean of its divisors is an integer number (539160995274).

Almost surely, 2^{2156253420707} is an apocalyptic number.

2156253420707 is a deficient number, since it is larger than the sum of its proper divisors (390560389).

2156253420707 is an equidigital number, since it uses as much as digits as its factorization.

2156253420707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390560388.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 2156253420707 in words is "two trillion, one hundred fifty-six billion, two hundred fifty-three million, four hundred twenty thousand, seven hundred seven".