1525649004 has 216 divisors, whose sum is σ = 4597669440. Its totient is φ = 421848000.

The previous prime is 1525648951. The next prime is 1525649017. The reversal of 1525649004 is 4009465251.

1525649004 is a `hidden beast` number, since 1 + 5 + 2 + 5 + 649 + 0 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1525649004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7230459 + ... + 7230669.

Almost surely, 2^1525649004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525649004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298834720).

1525649004 is an abundant number, since it is smaller than the sum of its proper divisors (3072020436).

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

1525649004 is a wasteful number, since it uses less digits than its factorization.

1525649004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1525649004 is about 39059.5571403466. The cubic root of 1525649004 is about 1151.2020207982.

The spelling of 1525649004 in words is "one billion, five hundred twenty-five million, six hundred forty-nine thousand, four".