81488690830 has 8 divisors (see below), whose sum is σ = 146679643512. Its totient is φ = 32595476328.

The previous prime is 81488690827. The next prime is 81488690837. The reversal of 81488690830 is 3809688418.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81488690837) 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, 4074434532 + ... + 4074434551.

It is an arithmetic number, because the mean of its divisors is an integer number (18334955439).

Almost surely, 2^81488690830 is an apocalyptic number.

81488690830 is a deficient number, since it is larger than the sum of its proper divisors (65190952682).

81488690830 is a wasteful number, since it uses less digits than its factorization.

81488690830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148869090.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 81488690830 in words is "eighty-one billion, four hundred eighty-eight million, six hundred ninety thousand, eight hundred thirty".