61667283945 has 24 divisors (see below), whose sum is σ = 100077035328. Its totient is φ = 32425949920.

The previous prime is 61667283917. The next prime is 61667283971. The reversal of 61667283945 is 54938276616.

It is not a de Polignac number, because 61667283945 - 2⁷ = 61667283817 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 332157 + ... + 483386.

It is an arithmetic number, because the mean of its divisors is an integer number (4169876472).

Almost surely, 2^61667283945 is an apocalyptic number.

It is an amenable number.

61667283945 is a deficient number, since it is larger than the sum of its proper divisors (38409751383).

61667283945 is an equidigital number, since it uses as much as digits as its factorization.

61667283945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815693 (or 815622 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 57.

The spelling of 61667283945 in words is "sixty-one billion, six hundred sixty-seven million, two hundred eighty-three thousand, nine hundred forty-five".