764195324640 has 576 divisors, whose sum is σ = 2906400268800. Its totient is φ = 167872573440.

The previous prime is 764195324597. The next prime is 764195324687. The reversal of 764195324640 is 46423591467.

764195324640 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×764195324640² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25365906 + ... + 25396014.

It is an arithmetic number, because the mean of its divisors is an integer number (5045833800).

Almost surely, 2^764195324640 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 764195324640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453200134400).

764195324640 is an abundant number, since it is smaller than the sum of its proper divisors (2142204944160).

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

764195324640 is a wasteful number, since it uses less digits than its factorization.

764195324640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30191 (or 30172 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 764195324640 in words is "seven hundred sixty-four billion, one hundred ninety-five million, three hundred twenty-four thousand, six hundred forty".