781481154342 has 128 divisors (see below), whose sum is σ = 1829082931200. Its totient is φ = 217990434816.

The previous prime is 781481154301. The next prime is 781481154343. The reversal of 781481154342 is 243451184187.

It is a super-2 number, since 2×781481154342² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781481154291 and 781481154300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781481154343) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290620134 + ... + 290622822.

It is an arithmetic number, because the mean of its divisors is an integer number (14289710400).

Almost surely, 2^781481154342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781481154342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914541465600).

781481154342 is an abundant number, since it is smaller than the sum of its proper divisors (1047601776858).

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

781481154342 is a wasteful number, since it uses less digits than its factorization.

781481154342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its digits is 860160, while the sum is 48.

The spelling of 781481154342 in words is "seven hundred eighty-one billion, four hundred eighty-one million, one hundred fifty-four thousand, three hundred forty-two".