1625651456 has 144 divisors (see below), whose sum is σ = 3854231808. Its totient is φ = 680232960.

The previous prime is 1625651413. The next prime is 1625651513. The reversal of 1625651456 is 6541565261.

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, 4429385 + ... + 4429751.

Almost surely, 2^1625651456 is an apocalyptic number.

1625651456 is a gapful number since it is divisible by the number (16) 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 1625651456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1927115904).

1625651456 is an abundant number, since it is smaller than the sum of its proper divisors (2228580352).

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

1625651456 is an equidigital number, since it uses as much as digits as its factorization.

1625651456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 393 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The square root of 1625651456 is about 40319.3682490190. The cubic root of 1625651456 is about 1175.8244296491.

The spelling of 1625651456 in words is "one billion, six hundred twenty-five million, six hundred fifty-one thousand, four hundred fifty-six".