1964773657 has 16 divisors (see below), whose sum is σ = 2593683072. Its totient is φ = 1440933120.

The previous prime is 1964773651. The next prime is 1964773661. The reversal of 1964773657 is 7563774691.

It is not a de Polignac number, because 1964773657 - 2¹⁵ = 1964740889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1964773598 and 1964773607.

It is not an unprimeable number, because it can be changed into a prime (1964773651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749178 + ... + 751795.

It is an arithmetic number, because the mean of its divisors is an integer number (162105192).

Almost surely, 2^1964773657 is an apocalyptic number.

1964773657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1964773657 is a deficient number, since it is larger than the sum of its proper divisors (628909415).

1964773657 is a wasteful number, since it uses less digits than its factorization.

1964773657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501008.

The product of its digits is 6667920, while the sum is 55.

The square root of 1964773657 is about 44325.7674158045. The cubic root of 1964773657 is about 1252.4801227651.

The spelling of 1964773657 in words is "one billion, nine hundred sixty-four million, seven hundred seventy-three thousand, six hundred fifty-seven".