61124240280 has 256 divisors, whose sum is σ = 191240248320. Its totient is φ = 15617581056.

The previous prime is 61124240239. The next prime is 61124240311. The reversal of 61124240280 is 8204242116.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99066532 + ... + 99067148.

It is an arithmetic number, because the mean of its divisors is an integer number (747032220).

Almost surely, 2^61124240280 is an apocalyptic number.

61124240280 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 61124240280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95620124160).

61124240280 is an abundant number, since it is smaller than the sum of its proper divisors (130116008040).

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

61124240280 is a wasteful number, since it uses less digits than its factorization.

61124240280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

Adding to 61124240280 its reverse (8204242116), we get a palindrome (69328482396).

The spelling of 61124240280 in words is "sixty-one billion, one hundred twenty-four million, two hundred forty thousand, two hundred eighty".