1625501406 has 32 divisors (see below), whose sum is σ = 3300880896. Its totient is φ = 533540000.

The previous prime is 1625501369. The next prime is 1625501411. The reversal of 1625501406 is 6041055261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437356 + ... + 441056.

It is an arithmetic number, because the mean of its divisors is an integer number (103152528).

Almost surely, 2^1625501406 is an apocalyptic number.

1625501406 is an abundant number, since it is smaller than the sum of its proper divisors (1675379490).

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

1625501406 is a wasteful number, since it uses less digits than its factorization.

1625501406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1625501406 is about 40317.5074378365. The cubic root of 1625501406 is about 1175.7882517661.

Adding to 1625501406 its reverse (6041055261), we get a palindrome (7666556667).

The spelling of 1625501406 in words is "one billion, six hundred twenty-five million, five hundred one thousand, four hundred six".