61511697 has 32 divisors (see below), whose sum is σ = 101539200. Its totient is φ = 36542016.

The previous prime is 61511693. The next prime is 61511701. The reversal of 61511697 is 79611516.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61511693) and next prime (61511701).

It is not a de Polignac number, because 61511697 - 2² = 61511693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61511693) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7158 + ... + 13200.

It is an arithmetic number, because the mean of its divisors is an integer number (3173100).

Almost surely, 2^61511697 is an apocalyptic number.

It is an amenable number.

61511697 is a deficient number, since it is larger than the sum of its proper divisors (40027503).

61511697 is a wasteful number, since it uses less digits than its factorization.

61511697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094 (or 6088 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 61511697 is about 7842.9393087031. The cubic root of 61511697 is about 394.7473618165.

The spelling of 61511697 in words is "sixty-one million, five hundred eleven thousand, six hundred ninety-seven".