84648367621 has 4 divisors (see below), whose sum is σ = 84651911500. Its totient is φ = 84644823744.

The previous prime is 84648367613. The next prime is 84648367663. The reversal of 84648367621 is 12676384648.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23397067521 + 61251300100 = 152961^2 + 247490^2 .

It is a cyclic number.

It is not a de Polignac number, because 84648367621 - 2³ = 84648367613 is a prime.

It is a super-2 number, since 2×84648367621² (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 (84648367681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735866 + ... + 1783963.

It is an arithmetic number, because the mean of its divisors is an integer number (21162977875).

Almost surely, 2^84648367621 is an apocalyptic number.

It is an amenable number.

84648367621 is a deficient number, since it is larger than the sum of its proper divisors (3543879).

84648367621 is a wasteful number, since it uses less digits than its factorization.

84648367621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543878.

The product of its digits is 9289728, while the sum is 55.

The spelling of 84648367621 in words is "eighty-four billion, six hundred forty-eight million, three hundred sixty-seven thousand, six hundred twenty-one".