47215208778 has 32 divisors (see below), whose sum is σ = 97589705472. Its totient is φ = 15218649600.

The previous prime is 47215208759. The next prime is 47215208797. The reversal of 47215208778 is 87780251274.

It is an interprime number because it is at equal distance from previous prime (47215208759) and next prime (47215208797).

It is a self number, because there is not a number n which added to its sum of digits gives 47215208778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821458 + ... + 877053.

It is an arithmetic number, because the mean of its divisors is an integer number (3049678296).

Almost surely, 2^47215208778 is an apocalyptic number.

47215208778 is an abundant number, since it is smaller than the sum of its proper divisors (50374496694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47215208778 is a wasteful number, since it uses less digits than its factorization.

47215208778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698670.

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 47215208778 in words is "forty-seven billion, two hundred fifteen million, two hundred eight thousand, seven hundred seventy-eight".