1525494644 has 6 divisors (see below), whose sum is σ = 2669615634. Its totient is φ = 762747320.

The previous prime is 1525494637. The next prime is 1525494671. The reversal of 1525494644 is 4464945251.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1381014244 + 144480400 = 37162^2 + 12020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1525494595 and 1525494604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190686827 + ... + 190686834.

It is an arithmetic number, because the mean of its divisors is an integer number (444935939).

Almost surely, 2^1525494644 is an apocalyptic number.

It is an amenable number.

1525494644 is a deficient number, since it is larger than the sum of its proper divisors (1144120990).

1525494644 is a wasteful number, since it uses less digits than its factorization.

1525494644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381373665 (or 381373663 counting only the distinct ones).

The product of its digits is 691200, while the sum is 44.

The square root of 1525494644 is about 39057.5811335008. The cubic root of 1525494644 is about 1151.1631945814.

The spelling of 1525494644 in words is "one billion, five hundred twenty-five million, four hundred ninety-four thousand, six hundred forty-four".