61047706720 has 192 divisors, whose sum is σ = 193645541376. Its totient is φ = 17564129280.

The previous prime is 61047706711. The next prime is 61047706729. The reversal of 61047706720 is 2760774016.

It is an interprime number because it is at equal distance from previous prime (61047706711) and next prime (61047706729).

It is a super-2 number, since 2×61047706720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61047706729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30424 + ... + 350743.

It is an arithmetic number, because the mean of its divisors is an integer number (1008570528).

Almost surely, 2^61047706720 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 61047706720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96822770688).

61047706720 is an abundant number, since it is smaller than the sum of its proper divisors (132597834656).

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

61047706720 is a wasteful number, since it uses less digits than its factorization.

61047706720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381213 (or 381205 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

It can be divided in two parts, 61047 and 706720, that added together give a palindrome (767767).

The spelling of 61047706720 in words is "sixty-one billion, forty-seven million, seven hundred six thousand, seven hundred twenty".