61531341424 has 120 divisors (see below), whose sum is σ = 146722294688. Its totient is φ = 24478433280.

The previous prime is 61531341383. The next prime is 61531341463. The reversal of 61531341424 is 42414313516.

It is a super-2 number, since 2×61531341424² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 61531341424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2349844 + ... + 2375884.

Almost surely, 2^61531341424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61531341424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73361147344).

61531341424 is an abundant number, since it is smaller than the sum of its proper divisors (85190953264).

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

61531341424 is a wasteful number, since it uses less digits than its factorization.

61531341424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26163 (or 26140 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The spelling of 61531341424 in words is "sixty-one billion, five hundred thirty-one million, three hundred forty-one thousand, four hundred twenty-four".