1625404011 has 24 divisors (see below), whose sum is σ = 2722444032. Its totient is φ = 844364400.

The previous prime is 1625404007. The next prime is 1625404013. The reversal of 1625404011 is 1104045261.

It is a happy number.

It is not a de Polignac number, because 1625404011 - 2² = 1625404007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625404013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317295 + ... + 322376.

It is an arithmetic number, because the mean of its divisors is an integer number (113435168).

Almost surely, 2^1625404011 is an apocalyptic number.

1625404011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1625404011 is a deficient number, since it is larger than the sum of its proper divisors (1097040021).

1625404011 is a wasteful number, since it uses less digits than its factorization.

1625404011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639703 (or 639692 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1625404011 is about 40316.2995697770. The cubic root of 1625404011 is about 1175.7647681026.

Adding to 1625404011 its reverse (1104045261), we get a palindrome (2729449272).

The spelling of 1625404011 in words is "one billion, six hundred twenty-five million, four hundred four thousand, eleven".