2156061630 has 32 divisors (see below), whose sum is σ = 5399529984. Its totient is φ = 549951776.

The previous prime is 2156061619. The next prime is 2156061641. The reversal of 2156061630 is 361606512.

It is an interprime number because it is at equal distance from previous prime (2156061619) and next prime (2156061641).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

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, 1561674 + ... + 1563053.

It is an arithmetic number, because the mean of its divisors is an integer number (168735312).

Almost surely, 2^2156061630 is an apocalyptic number.

2156061630 is an abundant number, since it is smaller than the sum of its proper divisors (3243468354).

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

2156061630 is a wasteful number, since it uses less digits than its factorization.

2156061630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124760.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2156061630 is about 46433.4107082390. The cubic root of 2156061630 is about 1291.8746915088.

The spelling of 2156061630 in words is "two billion, one hundred fifty-six million, sixty-one thousand, six hundred thirty".