47490234681 has 4 divisors (see below), whose sum is σ = 63320312912. Its totient is φ = 31660156452.

The previous prime is 47490234677. The next prime is 47490234707. The reversal of 47490234681 is 18643209474.

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 not a de Polignac number, because 47490234681 - 2² = 47490234677 is a prime.

It is a super-2 number, since 2×47490234681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47490234681.

It is not an unprimeable number, because it can be changed into a prime (47490234661) 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, 7915039111 + ... + 7915039116.

It is an arithmetic number, because the mean of its divisors is an integer number (15830078228).

Almost surely, 2^47490234681 is an apocalyptic number.

It is an amenable number.

47490234681 is a deficient number, since it is larger than the sum of its proper divisors (15830078231).

47490234681 is a wasteful number, since it uses less digits than its factorization.

47490234681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15830078230.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 47490234681 in words is "forty-seven billion, four hundred ninety million, two hundred thirty-four thousand, six hundred eighty-one".