61227260928 has 264 divisors, whose sum is σ = 189338329440. Its totient is φ = 18988400640.

The previous prime is 61227260921. The next prime is 61227260947. The reversal of 61227260928 is 82906272216.

61227260928 is a `hidden beast` number, since 6 + 12 + 2 + 7 + 2 + 609 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61227260921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13941613 + ... + 13946003.

Almost surely, 2^61227260928 is an apocalyptic number.

61227260928 is a gapful number since it is divisible by the number (68) 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 61227260928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94669164720).

61227260928 is an abundant number, since it is smaller than the sum of its proper divisors (128111068512).

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

61227260928 is a wasteful number, since it uses less digits than its factorization.

61227260928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 61227260928 in words is "sixty-one billion, two hundred twenty-seven million, two hundred sixty thousand, nine hundred twenty-eight".