11515452102 has 128 divisors (see below), whose sum is σ = 31972838400. Its totient is φ = 2984601600.

The previous prime is 11515452089. The next prime is 11515452131. The reversal of 11515452102 is 20125451511.

It is a happy number.

11515452102 is a `hidden beast` number, since 1 + 1 + 515 + 45 + 2 + 102 = 666.

It is a super-2 number, since 2×11515452102² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2113702 + ... + 2119142.

It is an arithmetic number, because the mean of its divisors is an integer number (249787800).

Almost surely, 2^11515452102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11515452102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15986419200).

11515452102 is an abundant number, since it is smaller than the sum of its proper divisors (20457386298).

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

11515452102 is a wasteful number, since it uses less digits than its factorization.

11515452102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979 (or 5973 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

It can be divided in two parts, 1151 and 5452102, that added together give a triangular number (5453253 = T₃₃₀₂).

The spelling of 11515452102 in words is "eleven billion, five hundred fifteen million, four hundred fifty-two thousand, one hundred two".