61222901760 has 384 divisors, whose sum is σ = 220461696000. Its totient is φ = 16113696768.

The previous prime is 61222901743. The next prime is 61222901879. The reversal of 61222901760 is 6710922216.

61222901760 is a `hidden beast` number, since 612 + 2 + 29 + 0 + 17 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×61222901760² (a number of 22 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 21840519 + ... + 21843321.

It is an arithmetic number, because the mean of its divisors is an integer number (574119000).

Almost surely, 2^61222901760 is an apocalyptic number.

61222901760 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 61222901760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110230848000).

61222901760 is an abundant number, since it is smaller than the sum of its proper divisors (159238794240).

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

61222901760 is a wasteful number, since it uses less digits than its factorization.

61222901760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918 (or 2892 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 61222901760 in words is "sixty-one billion, two hundred twenty-two million, nine hundred one thousand, seven hundred sixty".