1625809104 has 80 divisors (see below), whose sum is σ = 4696594240. Its totient is φ = 538462080.

The previous prime is 1625809099. The next prime is 1625809147. The reversal of 1625809104 is 4019085261.

1625809104 is a `hidden beast` number, since 1 + 62 + 580 + 9 + 10 + 4 = 666.

It is a super-4 number, since 4×1625809104⁴ (a number of 38 digits) contains 4444 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 15 ways as a sum of consecutive naturals, for example, 55839 + ... + 79809.

It is an arithmetic number, because the mean of its divisors is an integer number (58707428).

Almost surely, 2^1625809104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625809104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2348297120).

1625809104 is an abundant number, since it is smaller than the sum of its proper divisors (3070785136).

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

1625809104 is a wasteful number, since it uses less digits than its factorization.

1625809104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24145 (or 24133 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1625809104 is about 40321.3231925739. The cubic root of 1625809104 is about 1175.8624370537.

The spelling of 1625809104 in words is "one billion, six hundred twenty-five million, eight hundred nine thousand, one hundred four".