1021768695 has 32 divisors (see below), whose sum is σ = 1826668800. Its totient is φ = 541886112.

The previous prime is 1021768669. The next prime is 1021768703. The reversal of 1021768695 is 5968671201.

It is not a de Polignac number, because 1021768695 - 2⁸ = 1021768439 is a prime.

It is a super-2 number, since 2×1021768695² = 2088022532164006050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1021768695.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3024 + ... + 45306.

It is an arithmetic number, because the mean of its divisors is an integer number (57083400).

Almost surely, 2^1021768695 is an apocalyptic number.

1021768695 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021768695 is a deficient number, since it is larger than the sum of its proper divisors (804900105).

1021768695 is a wasteful number, since it uses less digits than its factorization.

1021768695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42476 (or 42470 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1021768695 is about 31965.1168463374. The cubic root of 1021768695 is about 1007.2042064420.

The spelling of 1021768695 in words is "one billion, twenty-one million, seven hundred sixty-eight thousand, six hundred ninety-five".