147377881721 has 8 divisors (see below), whose sum is σ = 172539959424. Its totient is φ = 123242827680.

The previous prime is 147377881691. The next prime is 147377881733. The reversal of 147377881721 is 127188773741.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-147377881721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (147377881751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256755605 + ... + 256756178.

It is an arithmetic number, because the mean of its divisors is an integer number (21567494928).

Almost surely, 2^147377881721 is an apocalyptic number.

It is an amenable number.

147377881721 is a deficient number, since it is larger than the sum of its proper divisors (25162077703).

147377881721 is an equidigital number, since it uses as much as digits as its factorization.

147377881721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513511831.

The product of its digits is 3687936, while the sum is 56.

The spelling of 147377881721 in words is "one hundred forty-seven billion, three hundred seventy-seven million, eight hundred eighty-one thousand, seven hundred twenty-one".