771821052 has 12 divisors (see below), whose sum is σ = 1800915816. Its totient is φ = 257273680.

The previous prime is 771821047. The next prime is 771821069. The reversal of 771821052 is 250128177.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32159199 + ... + 32159222.

It is an arithmetic number, because the mean of its divisors is an integer number (150076318).

Almost surely, 2^771821052 is an apocalyptic number.

It is an amenable number.

771821052 is an abundant number, since it is smaller than the sum of its proper divisors (1029094764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771821052 is a wasteful number, since it uses less digits than its factorization.

771821052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64318428 (or 64318426 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 771821052 is about 27781.6675525426. The cubic root of 771821052 is about 917.2876366055.

The spelling of 771821052 in words is "seven hundred seventy-one million, eight hundred twenty-one thousand, fifty-two".