1625131011 has 48 divisors (see below), whose sum is σ = 2631813120. Its totient is φ = 888370560.

The previous prime is 1625131003. The next prime is 1625131061. The reversal of 1625131011 is 1101315261.

It is a happy number.

It is not a de Polignac number, because 1625131011 - 2³ = 1625131003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1625131061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 403570 + ... + 407576.

It is an arithmetic number, because the mean of its divisors is an integer number (54829440).

Almost surely, 2^1625131011 is an apocalyptic number.

1625131011 is a deficient number, since it is larger than the sum of its proper divisors (1006682109).

1625131011 is a wasteful number, since it uses less digits than its factorization.

1625131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1625131011 is about 40312.9137002028. The cubic root of 1625131011 is about 1175.6989379558.

Adding to 1625131011 its reverse (1101315261), we get a palindrome (2726446272).

The spelling of 1625131011 in words is "one billion, six hundred twenty-five million, one hundred thirty-one thousand, eleven".