772919945 has 32 divisors (see below), whose sum is σ = 1109680128. Its totient is φ = 505315008.

The previous prime is 772919941. The next prime is 772919971. The reversal of 772919945 is 549919277.

It is a cyclic number.

It is not a de Polignac number, because 772919945 - 2² = 772919941 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772919941) 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 31 ways as a sum of consecutive naturals, for example, 277952 + ... + 280718.

It is an arithmetic number, because the mean of its divisors is an integer number (34677504).

Almost surely, 2^772919945 is an apocalyptic number.

It is an amenable number.

772919945 is a deficient number, since it is larger than the sum of its proper divisors (336760183).

772919945 is a wasteful number, since it uses less digits than its factorization.

772919945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149.

The product of its digits is 1428840, while the sum is 53.

The square root of 772919945 is about 27801.4378225300. The cubic root of 772919945 is about 917.7227646499.

The spelling of 772919945 in words is "seven hundred seventy-two million, nine hundred nineteen thousand, nine hundred forty-five".