15368161540 has 24 divisors (see below), whose sum is σ = 32440365720. Its totient is φ = 6115411968.

The previous prime is 15368161537. The next prime is 15368161541. The reversal of 15368161540 is 4516186351.

It can be written as a sum of positive squares in 4 ways, for example, as 2549846016 + 12818315524 = 50496^2 + 113218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15368161493 and 15368161502.

It is not an unprimeable number, because it can be changed into a prime (15368161541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986835 + ... + 1994554.

It is an arithmetic number, because the mean of its divisors is an integer number (1351681905).

Almost surely, 2^15368161540 is an apocalyptic number.

15368161540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15368161540 is an abundant number, since it is smaller than the sum of its proper divisors (17072204180).

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

15368161540 is a wasteful number, since it uses less digits than its factorization.

15368161540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981591 (or 3981589 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 15368161540 in words is "fifteen billion, three hundred sixty-eight million, one hundred sixty-one thousand, five hundred forty".