61658671867 has 32 divisors (see below), whose sum is σ = 69020973504. Its totient is φ = 54709862400.

The previous prime is 61658671801. The next prime is 61658671931. The reversal of 61658671867 is 76817685616.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-61658671867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61658671567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45303267 + ... + 45304627.

It is an arithmetic number, because the mean of its divisors is an integer number (2156905422).

Almost surely, 2^61658671867 is an apocalyptic number.

61658671867 is a deficient number, since it is larger than the sum of its proper divisors (7362301637).

61658671867 is a wasteful number, since it uses less digits than its factorization.

61658671867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479.

The product of its digits is 20321280, while the sum is 61.

The spelling of 61658671867 in words is "sixty-one billion, six hundred fifty-eight million, six hundred seventy-one thousand, eight hundred sixty-seven".