61440537 has 8 divisors (see below), whose sum is σ = 82443136. Its totient is φ = 40699152.

The previous prime is 61440529. The next prime is 61440559. The reversal of 61440537 is 73504416.

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

It is not a de Polignac number, because 61440537 - 2³ = 61440529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61440517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64753 + ... + 65694.

It is an arithmetic number, because the mean of its divisors is an integer number (10305392).

Almost surely, 2^61440537 is an apocalyptic number.

It is an amenable number.

61440537 is a deficient number, since it is larger than the sum of its proper divisors (21002599).

61440537 is a wasteful number, since it uses less digits than its factorization.

61440537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130607.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 61440537 is about 7838.4014314144. The cubic root of 61440537 is about 394.5950815040.

The spelling of 61440537 in words is "sixty-one million, four hundred forty thousand, five hundred thirty-seven".