1625541641 has 8 divisors (see below), whose sum is σ = 1659009600. Its totient is φ = 1592177392.

The previous prime is 1625541623. The next prime is 1625541661. The reversal of 1625541641 is 1461455261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625541641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625541661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6146 + ... + 57348.

It is an arithmetic number, because the mean of its divisors is an integer number (207376200).

Almost surely, 2^1625541641 is an apocalyptic number.

It is an amenable number.

1625541641 is a deficient number, since it is larger than the sum of its proper divisors (33467959).

1625541641 is an equidigital number, since it uses as much as digits as its factorization.

1625541641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51855.

The product of its digits is 28800, while the sum is 35.

The square root of 1625541641 is about 40318.0064115278. The cubic root of 1625541641 is about 1175.7979528651.

The spelling of 1625541641 in words is "one billion, six hundred twenty-five million, five hundred forty-one thousand, six hundred forty-one".