61078613 has 4 divisors (see below), whose sum is σ = 61851840. Its totient is φ = 60305388.

The previous prime is 61078583. The next prime is 61078657. The reversal of 61078613 is 31687016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61078613 - 2¹⁰ = 61077589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61078613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61078013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386495 + ... + 386652.

It is an arithmetic number, because the mean of its divisors is an integer number (15462960).

Almost surely, 2^61078613 is an apocalyptic number.

It is an amenable number.

61078613 is a deficient number, since it is larger than the sum of its proper divisors (773227).

61078613 is an equidigital number, since it uses as much as digits as its factorization.

61078613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773226.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61078613 is about 7815.2807371201. The cubic root of 61078613 is about 393.8187494636.

The spelling of 61078613 in words is "sixty-one million, seventy-eight thousand, six hundred thirteen".