61322471280 has 640 divisors, whose sum is σ = 250312550400. Its totient is φ = 13508591616.

The previous prime is 61322471233. The next prime is 61322471303. The reversal of 61322471280 is 8217422316.

It is a happy number.

61322471280 is a `hidden beast` number, since 6 + 132 + 247 + 1 + 280 = 666.

61322471280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 47279592 + ... + 47280888.

It is an arithmetic number, because the mean of its divisors is an integer number (391113360).

Almost surely, 2^61322471280 is an apocalyptic number.

61322471280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61322471280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125156275200).

61322471280 is an abundant number, since it is smaller than the sum of its proper divisors (188990079120).

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

61322471280 is a wasteful number, since it uses less digits than its factorization.

61322471280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

Adding to 61322471280 its reverse (8217422316), we get a palindrome (69539893596).

The spelling of 61322471280 in words is "sixty-one billion, three hundred twenty-two million, four hundred seventy-one thousand, two hundred eighty".