61486491 has 16 divisors (see below), whose sum is σ = 89566848. Its totient is φ = 37209600.

The previous prime is 61486487. The next prime is 61486499. The reversal of 61486491 is 19468416.

It is not a de Polignac number, because 61486491 - 2² = 61486487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61486499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39396 + ... + 40926.

It is an arithmetic number, because the mean of its divisors is an integer number (5597928).

Almost surely, 2^61486491 is an apocalyptic number.

61486491 is a deficient number, since it is larger than the sum of its proper divisors (28080357).

61486491 is a wasteful number, since it uses less digits than its factorization.

61486491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762.

The product of its digits is 41472, while the sum is 39.

The square root of 61486491 is about 7841.3322209941. The cubic root of 61486491 is about 394.6934351549.

The spelling of 61486491 in words is "sixty-one million, four hundred eighty-six thousand, four hundred ninety-one".