61860321432 has 448 divisors, whose sum is σ = 215390952000. Its totient is φ = 16211653632.

The previous prime is 61860321401. The next prime is 61860321437. The reversal of 61860321432 is 23412306816.

61860321432 is a `hidden beast` number, since 6 + 1 + 8 + 603 + 2 + 1 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61860321437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 121532794 + ... + 121533302.

It is an arithmetic number, because the mean of its divisors is an integer number (480783375).

Almost surely, 2^61860321432 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 61860321432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107695476000).

61860321432 is an abundant number, since it is smaller than the sum of its proper divisors (153530630568).

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

61860321432 is a wasteful number, since it uses less digits than its factorization.

61860321432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 61860321432 in words is "sixty-one billion, eight hundred sixty million, three hundred twenty-one thousand, four hundred thirty-two".