771661316 has 48 divisors (see below), whose sum is σ = 1456164864. Its totient is φ = 356907936.

The previous prime is 771661313. The next prime is 771661327. The reversal of 771661316 is 613166177.

It is a super-2 number, since 2×771661316² = 1190922373221703712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 771661316.

It is not an unprimeable number, because it can be changed into a prime (771661313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422381 + ... + 424203.

It is an arithmetic number, because the mean of its divisors is an integer number (30336768).

Almost surely, 2^771661316 is an apocalyptic number.

It is an amenable number.

771661316 is a deficient number, since it is larger than the sum of its proper divisors (684503548).

771661316 is a wasteful number, since it uses less digits than its factorization.

771661316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000 (or 1998 counting only the distinct ones).

The product of its digits is 31752, while the sum is 38.

The square root of 771661316 is about 27778.7925583529. The cubic root of 771661316 is about 917.2243516567.

The spelling of 771661316 in words is "seven hundred seventy-one million, six hundred sixty-one thousand, three hundred sixteen".