1520445546 has 64 divisors (see below), whose sum is σ = 3443420160. Its totient is φ = 497190960.

The previous prime is 1520445527. The next prime is 1520445547. The reversal of 1520445546 is 6455440251.

1520445546 is a `hidden beast` number, since 1 + 520 + 44 + 55 + 46 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1520445546.

It is not an unprimeable number, because it can be changed into a prime (1520445547) 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, 869445 + ... + 871191.

It is an arithmetic number, because the mean of its divisors is an integer number (53803440).

Almost surely, 2^1520445546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520445546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721710080).

1520445546 is an abundant number, since it is smaller than the sum of its proper divisors (1922974614).

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

1520445546 is a wasteful number, since it uses less digits than its factorization.

1520445546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 1520445546 is about 38992.8909674571. The cubic root of 1520445546 is about 1149.8917468359.

Adding to 1520445546 its reverse (6455440251), we get a palindrome (7975885797).

The spelling of 1520445546 in words is "one billion, five hundred twenty million, four hundred forty-five thousand, five hundred forty-six".