130678635721 has 4 divisors (see below), whose sum is σ = 130698208000. Its totient is φ = 130659063444.

The previous prime is 130678635701. The next prime is 130678635743. The reversal of 130678635721 is 127536876031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130678635721 - 2⁹ = 130678635209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130678635701) 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, 9776121 + ... + 9789478.

It is an arithmetic number, because the mean of its divisors is an integer number (32674552000).

Almost surely, 2^130678635721 is an apocalyptic number.

It is an amenable number.

130678635721 is a deficient number, since it is larger than the sum of its proper divisors (19572279).

130678635721 is an equidigital number, since it uses as much as digits as its factorization.

130678635721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19572278.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 130678635721 in words is "one hundred thirty billion, six hundred seventy-eight million, six hundred thirty-five thousand, seven hundred twenty-one".