61015345 has 4 divisors (see below), whose sum is σ = 73218420. Its totient is φ = 48812272.

The previous prime is 61015337. The next prime is 61015369. The reversal of 61015345 is 54351016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33547264 + 27468081 = 5792^2 + 5241^2 .

It is a cyclic number.

It is not a de Polignac number, because 61015345 - 2³ = 61015337 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6101530 + ... + 6101539.

It is an arithmetic number, because the mean of its divisors is an integer number (18304605).

Almost surely, 2^61015345 is an apocalyptic number.

It is an amenable number.

61015345 is a deficient number, since it is larger than the sum of its proper divisors (12203075).

61015345 is a wasteful number, since it uses less digits than its factorization.

61015345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203074.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 61015345 is about 7811.2319770955. The cubic root of 61015345 is about 393.6827240396.

The spelling of 61015345 in words is "sixty-one million, fifteen thousand, three hundred forty-five".