1525878906 has 32 divisors (see below), whose sum is σ = 3164184000. Its totient is φ = 489968640.

The previous prime is 1525878899. The next prime is 1525878943. The reversal of 1525878906 is 6098785251.

1525878906 is nontrivially palindromic in base 5.

1525878906 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

1525878906 is a nontrivial repdigit in base 5.

It is a plaindrome in base 5.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is an unprimeable number.

It is a nontrivial repunit in base 5.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68361 + ... + 87891.

It is an arithmetic number, because the mean of its divisors is an integer number (98880750).

Almost surely, 2^1525878906 is an apocalyptic number.

It is a pronic number, being equal to 39062×39063.

1525878906 is an abundant number, since it is smaller than the sum of its proper divisors (1638305094).

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

1525878906 is a wasteful number, since it uses less digits than its factorization.

1525878906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20014.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 1525878906 is about 39062.4999968000. The cubic root of 1525878906 is about 1151.2598432622.

The spelling of 1525878906 in words is "one billion, five hundred twenty-five million, eight hundred seventy-eight thousand, nine hundred six".