1618811652 has 24 divisors (see below), whose sum is σ = 3779298432. Its totient is φ = 539308000.

The previous prime is 1618811629. The next prime is 1618811659. The reversal of 1618811652 is 2561188161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618811652.

It is not an unprimeable number, because it can be changed into a prime (1618811659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13599 + ... + 58502.

It is an arithmetic number, because the mean of its divisors is an integer number (157470768).

Almost surely, 2^1618811652 is an apocalyptic number.

1618811652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1618811652 is an abundant number, since it is smaller than the sum of its proper divisors (2160486780).

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

1618811652 is a wasteful number, since it uses less digits than its factorization.

1618811652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73979 (or 73977 counting only the distinct ones).

The product of its digits is 23040, while the sum is 39.

The square root of 1618811652 is about 40234.4585150590. The cubic root of 1618811652 is about 1174.1730477124.

The spelling of 1618811652 in words is "one billion, six hundred eighteen million, eight hundred eleven thousand, six hundred fifty-two".