84521660311 has 8 divisors (see below), whose sum is σ = 92225026944. Its totient is φ = 76821556920.

The previous prime is 84521660309. The next prime is 84521660323. The reversal of 84521660311 is 11306612548.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84521660311 - 2¹ = 84521660309 is a prime.

It is a super-2 number, since 2×84521660311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84521660381) 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, 761491 + ... + 865396.

It is an arithmetic number, because the mean of its divisors is an integer number (11528128368).

Almost surely, 2^84521660311 is an apocalyptic number.

84521660311 is a deficient number, since it is larger than the sum of its proper divisors (7703366633).

84521660311 is a wasteful number, since it uses less digits than its factorization.

84521660311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631621.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 84521660311 in words is "eighty-four billion, five hundred twenty-one million, six hundred sixty thousand, three hundred eleven".