10115551540 has 12 divisors (see below), whose sum is σ = 21242658276. Its totient is φ = 4046220608.

The previous prime is 10115551517. The next prime is 10115551541. The reversal of 10115551540 is 4515551101.

10115551540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4759068196 + 5356483344 = 68986^2 + 73188^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10115551499 and 10115551508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10115551541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252888769 + ... + 252888808.

It is an arithmetic number, because the mean of its divisors is an integer number (1770221523).

Almost surely, 2^10115551540 is an apocalyptic number.

10115551540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10115551540 is an abundant number, since it is smaller than the sum of its proper divisors (11127106736).

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

10115551540 is a wasteful number, since it uses less digits than its factorization.

10115551540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505777586 (or 505777584 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 10115551540 in words is "ten billion, one hundred fifteen million, five hundred fifty-one thousand, five hundred forty".