61785494 has 4 divisors (see below), whose sum is σ = 92678244. Its totient is φ = 30892746.

The previous prime is 61785487. The next prime is 61785509. The reversal of 61785494 is 49458716.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15446372 + ... + 15446375.

It is an arithmetic number, because the mean of its divisors is an integer number (23169561).

Almost surely, 2^61785494 is an apocalyptic number.

61785494 is a deficient number, since it is larger than the sum of its proper divisors (30892750).

61785494 is a wasteful number, since it uses less digits than its factorization.

61785494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30892749.

The product of its digits is 241920, while the sum is 44.

The square root of 61785494 is about 7860.3749274446. The cubic root of 61785494 is about 395.3321865109.

The spelling of 61785494 in words is "sixty-one million, seven hundred eighty-five thousand, four hundred ninety-four".