84001251620 has 144 divisors (see below), whose sum is σ = 211758914304. Its totient is φ = 27798355200.

The previous prime is 84001251611. The next prime is 84001251629. The reversal of 84001251620 is 2615210048.

It is an interprime number because it is at equal distance from previous prime (84001251611) and next prime (84001251629).

It is not an unprimeable number, because it can be changed into a prime (84001251629) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2214857 + ... + 2252463.

It is an arithmetic number, because the mean of its divisors is an integer number (1470548016).

Almost surely, 2^84001251620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84001251620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105879457152).

84001251620 is an abundant number, since it is smaller than the sum of its proper divisors (127757662684).

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

84001251620 is a wasteful number, since it uses less digits than its factorization.

84001251620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37722 (or 37709 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 84001251620 its reverse (2615210048), we get a palindrome (86616461668).

The spelling of 84001251620 in words is "eighty-four billion, one million, two hundred fifty-one thousand, six hundred twenty".