1628500051 has 4 divisors (see below), whose sum is σ = 1714210600. Its totient is φ = 1542789504.

The previous prime is 1628500037. The next prime is 1628500061. The reversal of 1628500051 is 1500058261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1628500051 - 2⁵ = 1628500019 is a prime.

It is a super-2 number, since 2×1628500051² = 5304024832214005202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1628499992 and 1628500019.

It is not an unprimeable number, because it can be changed into a prime (1628500001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42855246 + ... + 42855283.

It is an arithmetic number, because the mean of its divisors is an integer number (428552650).

Almost surely, 2^1628500051 is an apocalyptic number.

1628500051 is a deficient number, since it is larger than the sum of its proper divisors (85710549).

1628500051 is an equidigital number, since it uses as much as digits as its factorization.

1628500051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85710548.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 1628500051 is about 40354.6781798591. The cubic root of 1628500051 is about 1176.5108197302.

The spelling of 1628500051 in words is "one billion, six hundred twenty-eight million, five hundred thousand, fifty-one".