47451093891 has 16 divisors (see below), whose sum is σ = 63463622400.
Its totient is φ = 31536368928.
The previous prime is 47451093881. The next prime is 47451093901. The reversal of 47451093891 is 19839015474.
It is an interprime number because it is at equal distance from previous prime (47451093881) and next prime (47451093901).
It is a de Polignac number, because none of the positive numbers 2k-47451093891 is a prime.
It is a super-2 number, since 2×474510938912 (a number of 22 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (47451093841) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6317160 + ... + 6324666.
It is an arithmetic number, because the mean of its divisors is an integer number (3966476400).
Almost surely, 247451093891 is an apocalyptic number.
47451093891 is a deficient number, since it is larger than the sum of its proper divisors (16012528509).
47451093891 is a wasteful number, since it uses less digits than its factorization.
47451093891 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13738.
The product of its (nonzero) digits is 1088640, while the sum is 51.
The spelling of 47451093891 in words is "forty-seven billion, four hundred fifty-one million, ninety-three thousand, eight hundred ninety-one".