61847478432 has 144 divisors (see below), whose sum is σ = 179144784000. Its totient is φ = 20236372992.

The previous prime is 61847478373. The next prime is 61847478443. The reversal of 61847478432 is 23487474816.

61847478432 is a `hidden beast` number, since 61 + 8 + 474 + 7 + 84 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×61847478432³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3554169 + ... + 3571527.

It is an arithmetic number, because the mean of its divisors is an integer number (1244061000).

Almost surely, 2^61847478432 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 61847478432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89572392000).

61847478432 is an abundant number, since it is smaller than the sum of its proper divisors (117297305568).

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

61847478432 is a wasteful number, since it uses less digits than its factorization.

61847478432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17603 (or 17592 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

It can be divided in two parts, 618474784 and 32, that added together give a palindrome (618474816).

The spelling of 61847478432 in words is "sixty-one billion, eight hundred forty-seven million, four hundred seventy-eight thousand, four hundred thirty-two".