761804144640 has 2160 divisors, whose sum is σ = 3524340927744. Its totient is φ = 156067430400.

The previous prime is 761804144611. The next prime is 761804144641. The reversal of 761804144640 is 46441408167.

761804144640 is a `hidden beast` number, since 7 + 6 + 180 + 4 + 1 + 4 + 464 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761804144641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10729635805 + ... + 10729635875.

Almost surely, 2^761804144640 is an apocalyptic number.

761804144640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 761804144640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762170463872).

761804144640 is an abundant number, since it is smaller than the sum of its proper divisors (2762536783104).

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

761804144640 is an equidigital number, since it uses as much as digits as its factorization.

761804144640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 761804144640 in words is "seven hundred sixty-one billion, eight hundred four million, one hundred forty-four thousand, six hundred forty".