1625145511 has 4 divisors (see below), whose sum is σ = 1772886024. Its totient is φ = 1477405000.

The previous prime is 1625145493. The next prime is 1625145527. The reversal of 1625145511 is 1155415261.

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 1625145511 - 2⁵ = 1625145479 is a prime.

It is a super-2 number, since 2×1625145511² = 5282195863846902242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625140511) 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, 73870240 + ... + 73870261.

It is an arithmetic number, because the mean of its divisors is an integer number (443221506).

Almost surely, 2^1625145511 is an apocalyptic number.

1625145511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1625145511 is a deficient number, since it is larger than the sum of its proper divisors (147740513).

1625145511 is a wasteful number, since it uses less digits than its factorization.

1625145511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147740512.

The product of its digits is 6000, while the sum is 31.

The square root of 1625145511 is about 40313.0935429173. The cubic root of 1625145511 is about 1175.7024346142.

The spelling of 1625145511 in words is "one billion, six hundred twenty-five million, one hundred forty-five thousand, five hundred eleven".