618781142 has 32 divisors (see below), whose sum is σ = 1110042624. Its totient is φ = 253108800.

The previous prime is 618781123. The next prime is 618781171. The reversal of 618781142 is 241187816.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 618781096 and 618781105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21917 + ... + 41447.

It is an arithmetic number, because the mean of its divisors is an integer number (34688832).

Almost surely, 2^618781142 is an apocalyptic number.

618781142 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

618781142 is a deficient number, since it is larger than the sum of its proper divisors (491261482).

618781142 is a wasteful number, since it uses less digits than its factorization.

618781142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19644.

The product of its digits is 21504, while the sum is 38.

The square root of 618781142 is about 24875.3118975421. The cubic root of 618781142 is about 852.1427562081.

The spelling of 618781142 in words is "six hundred eighteen million, seven hundred eighty-one thousand, one hundred forty-two".