981618725 has 12 divisors (see below), whose sum is σ = 1270130016. Its totient is φ = 751151280.

The previous prime is 981618691. The next prime is 981618731. The reversal of 981618725 is 527816189.

It is not a de Polignac number, because 981618725 - 2⁶ = 981618661 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 981618725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 853007 + ... + 854156.

It is an arithmetic number, because the mean of its divisors is an integer number (105844168).

Almost surely, 2^981618725 is an apocalyptic number.

It is an amenable number.

981618725 is a deficient number, since it is larger than the sum of its proper divisors (288511291).

981618725 is a wasteful number, since it uses less digits than its factorization.

981618725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707196 (or 1707191 counting only the distinct ones).

The product of its digits is 241920, while the sum is 47.

The square root of 981618725 is about 31330.7951542887. The cubic root of 981618725 is about 993.8349789545.

The spelling of 981618725 in words is "nine hundred eighty-one million, six hundred eighteen thousand, seven hundred twenty-five".