47022017778 has 66 divisors (see below), whose sum is σ = 105966877167. Its totient is φ = 15649165980.

The previous prime is 47022017767. The next prime is 47022017789. The reversal of 47022017778 is 87771022074.

47022017778 is a `hidden beast` number, since 470 + 2 + 2 + 0 + 177 + 7 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (47022017767) and next prime (47022017789).

It can be written as a sum of positive squares in only one way, i.e., 23511008889 + 23511008889 = 153333^2 + 153333^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=153333.

It is a super-2 number, since 2×47022017778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 74519523 + ... + 74520153.

Almost surely, 2^47022017778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47022017778

47022017778 is an abundant number, since it is smaller than the sum of its proper divisors (58944859389).

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

47022017778 is an frugal number, since it uses more digits than its factorization.

47022017778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 45.

The spelling of 47022017778 in words is "forty-seven billion, twenty-two million, seventeen thousand, seven hundred seventy-eight".