771849648 has 120 divisors (see below), whose sum is σ = 2274312768. Its totient is φ = 253357632.

The previous prime is 771849599. The next prime is 771849763. The reversal of 771849648 is 846948177.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 771849594 and 771849603.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259015 + ... + 261977.

Almost surely, 2^771849648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771849648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137156384).

771849648 is an abundant number, since it is smaller than the sum of its proper divisors (1502463120).

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

771849648 is a wasteful number, since it uses less digits than its factorization.

771849648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053 (or 3035 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 771849648 is about 27782.1822037075. The cubic root of 771849648 is about 917.2989649798.

The spelling of 771849648 in words is "seven hundred seventy-one million, eight hundred forty-nine thousand, six hundred forty-eight".