61817049 has 24 divisors (see below), whose sum is σ = 108051840. Its totient is φ = 33245568.

The previous prime is 61817029. The next prime is 61817059. The reversal of 61817049 is 94071816.

It is not a de Polignac number, because 61817049 - 2⁸ = 61816793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61817029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27789 + ... + 29930.

It is an arithmetic number, because the mean of its divisors is an integer number (4502160).

Almost surely, 2^61817049 is an apocalyptic number.

It is an amenable number.

61817049 is a deficient number, since it is larger than the sum of its proper divisors (46234791).

61817049 is a wasteful number, since it uses less digits than its factorization.

61817049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57749 (or 57746 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61817049 is about 7862.3818910048. The cubic root of 61817049 is about 395.3994762217.

The spelling of 61817049 in words is "sixty-one million, eight hundred seventeen thousand, forty-nine".