102018276409 has 27 divisors (see below), whose sum is σ = 120108810213. Its totient is φ = 86399789112.

The previous prime is 102018276389. The next prime is 102018276419. The reversal of 102018276409 is 904672810201.

The square root of 102018276409 is 319403.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 102018276409 - 2²⁵ = 101984721977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102018276419) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 230289342 + ... + 230289784.

Almost surely, 2^102018276409 is an apocalyptic number.

102018276409 is the 319403-rd square number.

102018276409 is the 159702-nd centered octagonal number.

It is an amenable number.

102018276409 is a deficient number, since it is larger than the sum of its proper divisors (18090533804).

102018276409 is an frugal number, since it uses more digits than its factorization.

102018276409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 102018276409 in words is "one hundred two billion, eighteen million, two hundred seventy-six thousand, four hundred nine".