61516545 has 8 divisors (see below), whose sum is σ = 98426496. Its totient is φ = 32808816.

The previous prime is 61516501. The next prime is 61516549. The reversal of 61516545 is 54561516.

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

It is not a de Polignac number, because 61516545 - 2¹⁴ = 61500161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61516549) 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, 2050537 + ... + 2050566.

It is an arithmetic number, because the mean of its divisors is an integer number (12303312).

Almost surely, 2^61516545 is an apocalyptic number.

It is an amenable number.

61516545 is a deficient number, since it is larger than the sum of its proper divisors (36909951).

61516545 is a wasteful number, since it uses less digits than its factorization.

61516545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101111.

The product of its digits is 18000, while the sum is 33.

The square root of 61516545 is about 7843.2483704139. The cubic root of 61516545 is about 394.7577321202.

The spelling of 61516545 in words is "sixty-one million, five hundred sixteen thousand, five hundred forty-five".