61440491 has 8 divisors (see below), whose sum is σ = 70332384. Its totient is φ = 52577280.

The previous prime is 61440487. The next prime is 61440493. The reversal of 61440491 is 19404416.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61440491 - 2² = 61440487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61440493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2360 + ... + 11333.

It is an arithmetic number, because the mean of its divisors is an integer number (8791548).

Almost surely, 2^61440491 is an apocalyptic number.

61440491 is a deficient number, since it is larger than the sum of its proper divisors (8891893).

61440491 is a wasteful number, since it uses less digits than its factorization.

61440491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14341.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 61440491 is about 7838.3984971421. The cubic root of 61440491 is about 394.5949830273.

The spelling of 61440491 in words is "sixty-one million, four hundred forty thousand, four hundred ninety-one".