764861481 has 64 divisors (see below), whose sum is σ = 1240842240. Its totient is φ = 464175360.

The previous prime is 764861479. The next prime is 764861533. The reversal of 764861481 is 184168467.

764861481 is a `hidden beast` number, since 76 + 48 + 61 + 481 = 666.

It is not a de Polignac number, because 764861481 - 2¹ = 764861479 is a prime.

It is a super-2 number, since 2×764861481² = 1170026170235026722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (764861431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1289521 + ... + 1290113.

It is an arithmetic number, because the mean of its divisors is an integer number (19388160).

Almost surely, 2^764861481 is an apocalyptic number.

It is an amenable number.

764861481 is a deficient number, since it is larger than the sum of its proper divisors (475980759).

764861481 is a wasteful number, since it uses less digits than its factorization.

764861481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 764861481 is about 27656.1291760073. The cubic root of 764861481 is about 914.5222230207.

The spelling of 764861481 in words is "seven hundred sixty-four million, eight hundred sixty-one thousand, four hundred eighty-one".