84156649380 has 336 divisors, whose sum is σ = 281843743104. Its totient is φ = 21025059840.

The previous prime is 84156649337. The next prime is 84156649393. The reversal of 84156649380 is 8394665148.

84156649380 is a `hidden beast` number, since 8 + 4 + 1 + 566 + 49 + 38 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 65186535 + ... + 65187825.

It is an arithmetic number, because the mean of its divisors is an integer number (838820664).

Almost surely, 2^84156649380 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 84156649380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140921871552).

84156649380 is an abundant number, since it is smaller than the sum of its proper divisors (197687093724).

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

84156649380 is a wasteful number, since it uses less digits than its factorization.

84156649380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 84156649380 in words is "eighty-four billion, one hundred fifty-six million, six hundred forty-nine thousand, three hundred eighty".