61497159 has 4 divisors (see below), whose sum is σ = 81996216. Its totient is φ = 40998104.

The previous prime is 61497157. The next prime is 61497187. The reversal of 61497159 is 95179416.

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 61497159 - 2¹ = 61497157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61497159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61497151) 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, 10249524 + ... + 10249529.

It is an arithmetic number, because the mean of its divisors is an integer number (20499054).

Almost surely, 2^61497159 is an apocalyptic number.

61497159 is a deficient number, since it is larger than the sum of its proper divisors (20499057).

61497159 is a wasteful number, since it uses less digits than its factorization.

61497159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20499056.

The product of its digits is 68040, while the sum is 42.

The square root of 61497159 is about 7842.0124330429. The cubic root of 61497159 is about 394.7162604726.

The spelling of 61497159 in words is "sixty-one million, four hundred ninety-seven thousand, one hundred fifty-nine".