61440613 has 8 divisors (see below), whose sum is σ = 69043968. Its totient is φ = 54248304.

The previous prime is 61440583. The next prime is 61440629. The reversal of 61440613 is 31604416.

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

It is a cyclic number.

It is not a de Polignac number, because 61440613 - 2⁵ = 61440581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61447613) 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, 102445 + ... + 103042.

It is an arithmetic number, because the mean of its divisors is an integer number (8630496).

Almost surely, 2^61440613 is an apocalyptic number.

It is an amenable number.

61440613 is a deficient number, since it is larger than the sum of its proper divisors (7603355).

61440613 is a wasteful number, since it uses less digits than its factorization.

61440613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205523.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61440613 is about 7838.4062793402. The cubic root of 61440613 is about 394.5952442045.

The spelling of 61440613 in words is "sixty-one million, four hundred forty thousand, six hundred thirteen".