147976481278081 has 4 divisors (see below), whose sum is σ = 147994367963652. Its totient is φ = 147958594592512.

The previous prime is 147976481278057. The next prime is 147976481278111. The reversal of 147976481278081 is 180872184679741.

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

It can be written as a sum of positive squares in 2 ways, for example, as 97500003375681 + 50476477902400 = 9874209^2 + 7104680^2 .

It is a cyclic number.

It is not a de Polignac number, because 147976481278081 - 2⁷ = 147976481277953 is a prime.

It is a super-2 number, since 2×147976481278081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 147976481277995 and 147976481278013.

It is not an unprimeable number, because it can be changed into a prime (147976481278051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8943330376 + ... + 8943346921.

It is an arithmetic number, because the mean of its divisors is an integer number (36998591990913).

Almost surely, 2^{147976481278081} is an apocalyptic number.

It is an amenable number.

147976481278081 is a deficient number, since it is larger than the sum of its proper divisors (17886685571).

147976481278081 is an equidigital number, since it uses as much as digits as its factorization.

147976481278081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17886685570.

The product of its (nonzero) digits is 303464448, while the sum is 73.

The spelling of 147976481278081 in words is "one hundred forty-seven trillion, nine hundred seventy-six billion, four hundred eighty-one million, two hundred seventy-eight thousand, eighty-one".