1011643495 has 4 divisors (see below), whose sum is σ = 1213972200. Its totient is φ = 809314792.

The previous prime is 1011643487. The next prime is 1011643517. The reversal of 1011643495 is 5943461101.

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 1011643495 - 2³ = 1011643487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011643495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101164345 + ... + 101164354.

It is an arithmetic number, because the mean of its divisors is an integer number (303493050).

Almost surely, 2^1011643495 is an apocalyptic number.

1011643495 is a deficient number, since it is larger than the sum of its proper divisors (202328705).

1011643495 is an equidigital number, since it uses as much as digits as its factorization.

1011643495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202328704.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1011643495 is about 31806.3436282764. The cubic root of 1011643495 is about 1003.8661982478.

The spelling of 1011643495 in words is "one billion, eleven million, six hundred forty-three thousand, four hundred ninety-five".