81625002 has 8 divisors (see below), whose sum is σ = 163250016. Its totient is φ = 27208332.

The previous prime is 81625001. The next prime is 81625003. The reversal of 81625002 is 20052618.

It is an interprime number because it is at equal distance from previous prime (81625001) and next prime (81625003).

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

81625002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81625001) 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, 6802078 + ... + 6802089.

It is an arithmetic number, because the mean of its divisors is an integer number (20406252).

Almost surely, 2^81625002 is an apocalyptic number.

81625002 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.

81625002 is a wasteful number, since it uses less digits than its factorization.

81625002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604172.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81625002 is about 9034.6556104812. The cubic root of 81625002 is about 433.7848714722.

The spelling of 81625002 in words is "eighty-one million, six hundred twenty-five thousand, two".