2156655060 has 144 divisors (see below), whose sum is σ = 7579143936. Its totient is φ = 486176256.

The previous prime is 2156655043. The next prime is 2156655073. The reversal of 2156655060 is 605566512.

It is a happy number.

It is a super-2 number, since 2×2156655060² = 9302322095647207200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80257 + ... + 103703.

It is an arithmetic number, because the mean of its divisors is an integer number (52632944).

Almost surely, 2^2156655060 is an apocalyptic number.

2156655060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156655060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3789571968).

2156655060 is an abundant number, since it is smaller than the sum of its proper divisors (5422488876).

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

2156655060 is a wasteful number, since it uses less digits than its factorization.

2156655060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23542 (or 23537 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 2156655060 is about 46439.8003871679. The cubic root of 2156655060 is about 1291.9932049536.

The spelling of 2156655060 in words is "two billion, one hundred fifty-six million, six hundred fifty-five thousand, sixty".