1640403125 has 48 divisors (see below), whose sum is σ = 2216108160. Its totient is φ = 1210440000.

The previous prime is 1640403113. The next prime is 1640403131. The reversal of 1640403125 is 5213040461.

It is not a de Polignac number, because 1640403125 - 2⁴ = 1640403109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640403094 and 1640403103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2083982 + ... + 2084768.

It is an arithmetic number, because the mean of its divisors is an integer number (46168920).

Almost surely, 2^1640403125 is an apocalyptic number.

It is an amenable number.

1640403125 is a deficient number, since it is larger than the sum of its proper divisors (575705035).

1640403125 is an frugal number, since it uses more digits than its factorization.

1640403125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1640403125 is about 40501.8903879807. The cubic root of 1640403125 is about 1179.3703250199.

Adding to 1640403125 its reverse (5213040461), we get a palindrome (6853443586).

The spelling of 1640403125 in words is "one billion, six hundred forty million, four hundred three thousand, one hundred twenty-five".