61650879 has 16 divisors (see below), whose sum is σ = 86545152. Its totient is φ = 38960768.

The previous prime is 61650829. The next prime is 61650881. The reversal of 61650879 is 97805616.

It is a cyclic number.

It is not a de Polignac number, because 61650879 - 2⁸ = 61650623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61650879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3844 + ... + 11750.

It is an arithmetic number, because the mean of its divisors is an integer number (5409072).

Almost surely, 2^61650879 is an apocalyptic number.

61650879 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

61650879 is a deficient number, since it is larger than the sum of its proper divisors (24894273).

61650879 is a wasteful number, since it uses less digits than its factorization.

61650879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8046.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 61650879 is about 7851.8073715547. The cubic root of 61650879 is about 395.0448680539.

The spelling of 61650879 in words is "sixty-one million, six hundred fifty thousand, eight hundred seventy-nine".