2156135442344 has 16 divisors (see below), whose sum is σ = 4353735028020. Its totient is φ = 995139434880.

The previous prime is 2156135442287. The next prime is 2156135442427. The reversal of 2156135442344 is 4432445316512.

It can be written as a sum of positive squares in 2 ways, for example, as 1658351572900 + 497783869444 = 1287770^2 + 705538^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2156135442295 and 2156135442304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10366035677 + ... + 10366035884.

Almost surely, 2^{2156135442344} is an apocalyptic number.

It is an amenable number.

2156135442344 is an abundant number, since it is smaller than the sum of its proper divisors (2197599585676).

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

2156135442344 is a wasteful number, since it uses less digits than its factorization.

2156135442344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20732071580 (or 20732071576 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 44.

The spelling of 2156135442344 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-five million, four hundred forty-two thousand, three hundred forty-four".