618877861446 has 64 divisors (see below), whose sum is σ = 1360822643712. Its totient is φ = 186458992512.

The previous prime is 618877861397. The next prime is 618877861447. The reversal of 618877861446 is 644168778816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618877861447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1930591 + ... + 2228213.

It is an arithmetic number, because the mean of its divisors is an integer number (21262853808).

Almost surely, 2^618877861446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618877861446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680411321856).

618877861446 is an abundant number, since it is smaller than the sum of its proper divisors (741944782266).

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

618877861446 is a wasteful number, since it uses less digits than its factorization.

618877861446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298197.

The product of its digits is 86704128, while the sum is 66.

The spelling of 618877861446 in words is "six hundred eighteen billion, eight hundred seventy-seven million, eight hundred sixty-one thousand, four hundred forty-six".