781145541352 has 32 divisors (see below), whose sum is σ = 1667267167680. Its totient is φ = 339628495360.

The previous prime is 781145541343. The next prime is 781145541353. The reversal of 781145541352 is 253145541187.

It is a happy number.

It is a super-2 number, since 2×781145541352² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (781145541353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192968713 + ... + 192972760.

It is an arithmetic number, because the mean of its divisors is an integer number (52102098990).

Almost surely, 2^781145541352 is an apocalyptic number.

It is an amenable number.

781145541352 is an abundant number, since it is smaller than the sum of its proper divisors (886121626328).

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

781145541352 is a wasteful number, since it uses less digits than its factorization.

781145541352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385941513 (or 385941509 counting only the distinct ones).

The product of its digits is 672000, while the sum is 46.

The spelling of 781145541352 in words is "seven hundred eighty-one billion, one hundred forty-five million, five hundred forty-one thousand, three hundred fifty-two".