81702652 has 12 divisors (see below), whose sum is σ = 143138800. Its totient is φ = 40805856.

The previous prime is 81702631. The next prime is 81702653. The reversal of 81702652 is 25620718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81702653) 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, 7152 + ... + 14647.

Almost surely, 2^81702652 is an apocalyptic number.

It is an amenable number.

81702652 is a deficient number, since it is larger than the sum of its proper divisors (61436148).

81702652 is a wasteful number, since it uses less digits than its factorization.

81702652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740 (or 22738 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 81702652 is about 9038.9519303955. The cubic root of 81702652 is about 433.9223812999.

The spelling of 81702652 in words is "eighty-one million, seven hundred two thousand, six hundred fifty-two".