61863201792 has 440 divisors, whose sum is σ = 215713580544. Its totient is φ = 17291501568.

The previous prime is 61863201781. The next prime is 61863201793. The reversal of 61863201792 is 29710236816.

61863201792 is a `hidden beast` number, since 6 + 1 + 8 + 632 + 0 + 1 + 7 + 9 + 2 = 666.

It is a super-2 number, since 2×61863201792² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61863201793) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27287443 + ... + 27289709.

Almost surely, 2^61863201792 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 61863201792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107856790272).

61863201792 is an abundant number, since it is smaller than the sum of its proper divisors (153850378752).

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

61863201792 is a wasteful number, since it uses less digits than its factorization.

61863201792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353 (or 2326 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 61863201792 in words is "sixty-one billion, eight hundred sixty-three million, two hundred one thousand, seven hundred ninety-two".