1534165640 has 128 divisors (see below), whose sum is σ = 4171392000. Its totient is φ = 496067328.

The previous prime is 1534165639. The next prime is 1534165651. The reversal of 1534165640 is 465614351.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1534165640.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1505051 + ... + 1506069.

It is an arithmetic number, because the mean of its divisors is an integer number (32589000).

Almost surely, 2^1534165640 is an apocalyptic number.

1534165640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1534165640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2085696000).

1534165640 is an abundant number, since it is smaller than the sum of its proper divisors (2637226360).

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

1534165640 is a wasteful number, since it uses less digits than its factorization.

1534165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1534165640 is about 39168.4265703896. The cubic root of 1534165640 is about 1153.3401668731.

Adding to 1534165640 its reverse (465614351), we get a palindrome (1999779991).

The spelling of 1534165640 in words is "one billion, five hundred thirty-four million, one hundred sixty-five thousand, six hundred forty".