47139497978 has 8 divisors (see below), whose sum is σ = 71907708960. Its totient is φ = 23170261660.

The previous prime is 47139497957. The next prime is 47139497983. The reversal of 47139497978 is 87979493174.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199743518 + ... + 199743753.

It is an arithmetic number, because the mean of its divisors is an integer number (8988463620).

Almost surely, 2^47139497978 is an apocalyptic number.

47139497978 is a deficient number, since it is larger than the sum of its proper divisors (24768210982).

47139497978 is a wasteful number, since it uses less digits than its factorization.

47139497978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399487332.

The product of its digits is 96018048, while the sum is 68.

The spelling of 47139497978 in words is "forty-seven billion, one hundred thirty-nine million, four hundred ninety-seven thousand, nine hundred seventy-eight".