781136040960 has 2112 divisors, whose sum is σ = 3359011057920. Its totient is φ = 171284889600.

The previous prime is 781136040959. The next prime is 781136040989. The reversal of 781136040960 is 69040631187.

It is a happy number.

781136040960 is a `hidden beast` number, since 78 + 113 + 6 + 0 + 409 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (2112).

It is a super-2 number, since 2×781136040960² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11658746847 + ... + 11658746913.

Almost surely, 2^781136040960 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 781136040960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679505528960).

781136040960 is an abundant number, since it is smaller than the sum of its proper divisors (2577875016960).

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

781136040960 is a wasteful number, since it uses less digits than its factorization.

781136040960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 781136040960 in words is "seven hundred eighty-one billion, one hundred thirty-six million, forty thousand, nine hundred sixty".