1656724104 has 120 divisors (see below), whose sum is σ = 5398074990. Its totient is φ = 473340672.

The previous prime is 1656724079. The next prime is 1656724117. The reversal of 1656724104 is 4014276561.

It can be written as a sum of positive squares in only one way, i.e., 1656327204 + 396900 = 40698^2 + 630^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5664 + ... + 57840.

Almost surely, 2^1656724104 is an apocalyptic number.

1656724104 is a gapful number since it is divisible by the number (14) 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 1656724104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2699037495).

1656724104 is an abundant number, since it is smaller than the sum of its proper divisors (3741350886).

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

1656724104 is a wasteful number, since it uses less digits than its factorization.

1656724104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52209 (or 52189 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1656724104 is about 40702.8758689113. The cubic root of 1656724104 is about 1183.2687553905.

The spelling of 1656724104 in words is "one billion, six hundred fifty-six million, seven hundred twenty-four thousand, one hundred four".