1656312260 has 48 divisors (see below), whose sum is σ = 3621611952. Its totient is φ = 635750400.

The previous prime is 1656312253. The next prime is 1656312263. The reversal of 1656312260 is 622136561.

It can be written as a sum of positive squares in 8 ways, for example, as 839724484 + 816587776 = 28978^2 + 28576^2 .

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1656312263) 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, 33464 + ... + 66576.

It is an arithmetic number, because the mean of its divisors is an integer number (75450249).

Almost surely, 2^1656312260 is an apocalyptic number.

1656312260 is a gapful number since it is divisible by the number (10) 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 1656312260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1810805976).

1656312260 is an abundant number, since it is smaller than the sum of its proper divisors (1965299692).

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

1656312260 is a wasteful number, since it uses less digits than its factorization.

1656312260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33224 (or 33222 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1656312260 is about 40697.8164033404. The cubic root of 1656312260 is about 1183.1706979202.

The spelling of 1656312260 in words is "one billion, six hundred fifty-six million, three hundred twelve thousand, two hundred sixty".