772128851 has 16 divisors (see below), whose sum is σ = 856668960. Its totient is φ = 691380480.

The previous prime is 772128817. The next prime is 772128853. The reversal of 772128851 is 158821277.

It is a cyclic number.

It is not a de Polignac number, because 772128851 - 2⁶ = 772128787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772128799 and 772128808.

It is not an unprimeable number, because it can be changed into a prime (772128853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91361 + ... + 99453.

It is an arithmetic number, because the mean of its divisors is an integer number (53541810).

Almost surely, 2^772128851 is an apocalyptic number.

772128851 is a deficient number, since it is larger than the sum of its proper divisors (84540109).

772128851 is a wasteful number, since it uses less digits than its factorization.

772128851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326.

The product of its digits is 62720, while the sum is 41.

The square root of 772128851 is about 27787.2066066382. The cubic root of 772128851 is about 917.4095572212.

The spelling of 772128851 in words is "seven hundred seventy-two million, one hundred twenty-eight thousand, eight hundred fifty-one".