1625016401 has 8 divisors (see below), whose sum is σ = 1784915520. Its totient is φ = 1472554512.

The previous prime is 1625016389. The next prime is 1625016403. The reversal of 1625016401 is 1046105261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625016401 - 2²⁶ = 1557907537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625016403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1858850 + ... + 1859723.

It is an arithmetic number, because the mean of its divisors is an integer number (223114440).

Almost surely, 2^1625016401 is an apocalyptic number.

It is an amenable number.

1625016401 is a deficient number, since it is larger than the sum of its proper divisors (159899119).

1625016401 is a wasteful number, since it uses less digits than its factorization.

1625016401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718615.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1625016401 is about 40311.4921703477. The cubic root of 1625016401 is about 1175.6712991538.

The spelling of 1625016401 in words is "one billion, six hundred twenty-five million, sixteen thousand, four hundred one".