61808494 has 48 divisors (see below), whose sum is σ = 106868160. Its totient is φ = 26769600.

The previous prime is 61808491. The next prime is 61808503. The reversal of 61808494 is 49480816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61808491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 782347 + ... + 782425.

It is an arithmetic number, because the mean of its divisors is an integer number (2226420).

Almost surely, 2^61808494 is an apocalyptic number.

61808494 is a deficient number, since it is larger than the sum of its proper divisors (45059666).

61808494 is a wasteful number, since it uses less digits than its factorization.

61808494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 61808494 is about 7861.8378258522. The cubic root of 61808494 is about 395.3812353069.

The spelling of 61808494 in words is "sixty-one million, eight hundred eight thousand, four hundred ninety-four".