61426402560 has 216 divisors, whose sum is σ = 213490927104. Its totient is φ = 16306237440.

The previous prime is 61426402559. The next prime is 61426402571. The reversal of 61426402560 is 6520462416.

61426402560 is a `hidden beast` number, since 6 + 1 + 4 + 2 + 640 + 2 + 5 + 6 + 0 = 666.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2557005 + ... + 2580915.

Almost surely, 2^61426402560 is an apocalyptic number.

61426402560 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 61426402560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106745463552).

61426402560 is an abundant number, since it is smaller than the sum of its proper divisors (152064524544).

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

61426402560 is a wasteful number, since it uses less digits than its factorization.

61426402560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24161 (or 24144 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 61426402560 its reverse (6520462416), we get a palindrome (67946864976).

The spelling of 61426402560 in words is "sixty-one billion, four hundred twenty-six million, four hundred two thousand, five hundred sixty".