130621431566 has 4 divisors (see below), whose sum is σ = 195932147352. Its totient is φ = 65310715782.

The previous prime is 130621431559. The next prime is 130621431569. The reversal of 130621431566 is 665134126031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130621431569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32655357890 + ... + 32655357893.

It is an arithmetic number, because the mean of its divisors is an integer number (48983036838).

Almost surely, 2^130621431566 is an apocalyptic number.

130621431566 is a deficient number, since it is larger than the sum of its proper divisors (65310715786).

130621431566 is an equidigital number, since it uses as much as digits as its factorization.

130621431566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65310715785.

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 130621431566 its reverse (665134126031), we get a palindrome (795755557597).

The spelling of 130621431566 in words is "one hundred thirty billion, six hundred twenty-one million, four hundred thirty-one thousand, five hundred sixty-six".