61691410 has 64 divisors (see below), whose sum is σ = 127370880. Its totient is φ = 21306880.

The previous prime is 61691407. The next prime is 61691431. The reversal of 61691410 is 1419616.

61691410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 264654 + ... + 264886.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^61691410 is an apocalyptic number.

61691410 is an abundant number, since it is smaller than the sum of its proper divisors (65679470).

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

61691410 is a wasteful number, since it uses less digits than its factorization.

61691410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 61691410 is about 7854.3879456009. The cubic root of 61691410 is about 395.1314202452.

The spelling of 61691410 in words is "sixty-one million, six hundred ninety-one thousand, four hundred ten".