61487567 has 4 divisors (see below), whose sum is σ = 61763520. Its totient is φ = 61211616.

The previous prime is 61487561. The next prime is 61487593. The reversal of 61487567 is 76578416.

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

It is a cyclic number.

It is not a de Polignac number, because 61487567 - 2⁴ = 61487551 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 (61487561) 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, 137642 + ... + 138087.

It is an arithmetic number, because the mean of its divisors is an integer number (15440880).

Almost surely, 2^61487567 is an apocalyptic number.

61487567 is a deficient number, since it is larger than the sum of its proper divisors (275953).

61487567 is a wasteful number, since it uses less digits than its factorization.

61487567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275952.

The product of its digits is 282240, while the sum is 44.

The square root of 61487567 is about 7841.4008314841. The cubic root of 61487567 is about 394.6957374908.

The spelling of 61487567 in words is "sixty-one million, four hundred eighty-seven thousand, five hundred sixty-seven".