1565026540 has 96 divisors (see below), whose sum is σ = 4108737024. Its totient is φ = 486466560.

The previous prime is 1565026531. The next prime is 1565026549. The reversal of 1565026540 is 456205651.

It is an interprime number because it is at equal distance from previous prime (1565026531) and next prime (1565026549).

It is a junction number, because it is equal to n+sod(n) for n = 1565026496 and 1565026505.

It is not an unprimeable number, because it can be changed into a prime (1565026549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665647 + ... + 667993.

It is an arithmetic number, because the mean of its divisors is an integer number (42799344).

Almost surely, 2^1565026540 is an apocalyptic number.

1565026540 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 1565026540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2054368512).

1565026540 is an abundant number, since it is smaller than the sum of its proper divisors (2543710484).

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

1565026540 is a wasteful number, since it uses less digits than its factorization.

1565026540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2805 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1565026540 is about 39560.4163274352. The cubic root of 1565026540 is about 1161.0223201174.

The spelling of 1565026540 in words is "one billion, five hundred sixty-five million, twenty-six thousand, five hundred forty".