781106781142 has 16 divisors (see below), whose sum is σ = 1248185856960. Its totient is φ = 365540140872.

The previous prime is 781106781113. The next prime is 781106781149. The reversal of 781106781142 is 241187601187.

It is a super-2 number, since 2×781106781142² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781106781092 and 781106781101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781106781149) 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, 123824808 + ... + 123831115.

It is an arithmetic number, because the mean of its divisors is an integer number (78011616060).

Almost surely, 2^781106781142 is an apocalyptic number.

781106781142 is a deficient number, since it is larger than the sum of its proper divisors (467079075818).

781106781142 is a wasteful number, since it uses less digits than its factorization.

781106781142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247656027.

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 781106781142 in words is "seven hundred eighty-one billion, one hundred six million, seven hundred eighty-one thousand, one hundred forty-two".