1625216442 has 8 divisors (see below), whose sum is σ = 3250432896. Its totient is φ = 541738812.

The previous prime is 1625216423. The next prime is 1625216449. The reversal of 1625216442 is 2446125261.

It is a sphenic number, since it is the product of 3 distinct primes.

1625216442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1625216449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135434698 + ... + 135434709.

It is an arithmetic number, because the mean of its divisors is an integer number (406304112).

Almost surely, 2^1625216442 is an apocalyptic number.

1625216442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1625216442 is a wasteful number, since it uses less digits than its factorization.

1625216442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270869412.

The product of its digits is 23040, while the sum is 33.

The square root of 1625216442 is about 40313.9732847061. The cubic root of 1625216442 is about 1175.7195392438.

The spelling of 1625216442 in words is "one billion, six hundred twenty-five million, two hundred sixteen thousand, four hundred forty-two".