61981526 has 16 divisors (see below), whose sum is σ = 97502400. Its totient is φ = 29510208.

The previous prime is 61981511. The next prime is 61981537. The reversal of 61981526 is 62518916.

It is a self number, because there is not a number n which added to its sum of digits gives 61981526.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086 + ... + 11553.

It is an arithmetic number, because the mean of its divisors is an integer number (6093900).

Almost surely, 2^61981526 is an apocalyptic number.

61981526 is a deficient number, since it is larger than the sum of its proper divisors (35520874).

61981526 is a wasteful number, since it uses less digits than its factorization.

61981526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14743.

The product of its digits is 25920, while the sum is 38.

The square root of 61981526 is about 7872.8346864392. The cubic root of 61981526 is about 395.7498462621.

The spelling of 61981526 in words is "sixty-one million, nine hundred eighty-one thousand, five hundred twenty-six".