47081957978 has 16 divisors (see below), whose sum is σ = 79528469760. Its totient is φ = 20710538400.

The previous prime is 47081957977. The next prime is 47081958023. The reversal of 47081957978 is 87975918074.

It is not an unprimeable number, because it can be changed into a prime (47081957977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34516883 + ... + 34518246.

It is an arithmetic number, because the mean of its divisors is an integer number (4970529360).

Almost surely, 2^47081957978 is an apocalyptic number.

47081957978 is a deficient number, since it is larger than the sum of its proper divisors (32446511782).

47081957978 is a wasteful number, since it uses less digits than its factorization.

47081957978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69035173.

The product of its (nonzero) digits is 35562240, while the sum is 65.

The spelling of 47081957978 in words is "forty-seven billion, eighty-one million, nine hundred fifty-seven thousand, nine hundred seventy-eight".