81298470707 has 4 divisors (see below), whose sum is σ = 82211936760. Its totient is φ = 80385004656.

The previous prime is 81298470647. The next prime is 81298470769. The reversal of 81298470707 is 70707489218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81298470707 - 2¹⁰ = 81298469683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81298470787) 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, 456732893 + ... + 456733070.

It is an arithmetic number, because the mean of its divisors is an integer number (20552984190).

Almost surely, 2^81298470707 is an apocalyptic number.

81298470707 is a deficient number, since it is larger than the sum of its proper divisors (913466053).

81298470707 is an equidigital number, since it uses as much as digits as its factorization.

81298470707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913466052.

The product of its (nonzero) digits is 1580544, while the sum is 53.

The spelling of 81298470707 in words is "eighty-one billion, two hundred ninety-eight million, four hundred seventy thousand, seven hundred seven".