61541413976 has 80 divisors (see below), whose sum is σ = 135523584000. Its totient is φ = 26196660672.

The previous prime is 61541413963. The next prime is 61541414023. The reversal of 61541413976 is 67931414516.

It is a self number, because there is not a number n which added to its sum of digits gives 61541413976.

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 19 ways as a sum of consecutive naturals, for example, 2851241 + ... + 2872743.

It is an arithmetic number, because the mean of its divisors is an integer number (1694044800).

Almost surely, 2^61541413976 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 61541413976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67761792000).

61541413976 is an abundant number, since it is smaller than the sum of its proper divisors (73982170024).

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

61541413976 is a wasteful number, since it uses less digits than its factorization.

61541413976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21686 (or 21661 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The spelling of 61541413976 in words is "sixty-one billion, five hundred forty-one million, four hundred thirteen thousand, nine hundred seventy-six".