813380155782 has 8 divisors (see below), whose sum is σ = 1626760311576. Its totient is φ = 271126718592.

The previous prime is 813380155747. The next prime is 813380155787. The reversal of 813380155782 is 287551083318.

813380155782 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 sphenic number, since it is the product of 3 distinct primes.

813380155782 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813380155787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67781679643 + ... + 67781679654.

It is an arithmetic number, because the mean of its divisors is an integer number (203345038947).

Almost surely, 2^813380155782 is an apocalyptic number.

813380155782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

813380155782 is a wasteful number, since it uses less digits than its factorization.

813380155782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135563359302.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 813380155782 in words is "eight hundred thirteen billion, three hundred eighty million, one hundred fifty-five thousand, seven hundred eighty-two".