84771465618 has 64 divisors (see below), whose sum is σ = 197299307520. Its totient is φ = 23779474752.

The previous prime is 84771465613. The next prime is 84771465671. The reversal of 84771465618 is 81656417748.

It is a super-2 number, since 2×84771465618² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84771465613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1953505 + ... + 1996427.

It is an arithmetic number, because the mean of its divisors is an integer number (3082801680).

Almost surely, 2^84771465618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84771465618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98649653760).

84771465618 is an abundant number, since it is smaller than the sum of its proper divisors (112527841902).

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

84771465618 is a wasteful number, since it uses less digits than its factorization.

84771465618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43791.

The product of its digits is 9031680, while the sum is 57.

The spelling of 84771465618 in words is "eighty-four billion, seven hundred seventy-one million, four hundred sixty-five thousand, six hundred eighteen".