761771648 has 64 divisors (see below), whose sum is σ = 1674432000. Its totient is φ = 342312960.

The previous prime is 761771609. The next prime is 761771653. The reversal of 761771648 is 846177167.

It is a happy number.

761771648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122273 + ... + 128351.

It is an arithmetic number, because the mean of its divisors is an integer number (26163000).

Almost surely, 2^761771648 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 761771648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837216000).

761771648 is an abundant number, since it is smaller than the sum of its proper divisors (912660352).

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

761771648 is a wasteful number, since it uses less digits than its factorization.

761771648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193 (or 6181 counting only the distinct ones).

The product of its digits is 395136, while the sum is 47.

The square root of 761771648 is about 27600.2110136861. The cubic root of 761771648 is about 913.2890870758.

The spelling of 761771648 in words is "seven hundred sixty-one million, seven hundred seventy-one thousand, six hundred forty-eight".