1068994551 has 4 divisors (see below), whose sum is σ = 1425326072. Its totient is φ = 712663032.

The previous prime is 1068994547. The next prime is 1068994559. The reversal of 1068994551 is 1554998601.

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

It is not a de Polignac number, because 1068994551 - 2² = 1068994547 is a prime.

It is a super-2 number, since 2×1068994551² = 2285498700135383202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1068994551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068994559) 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, 178165756 + ... + 178165761.

It is an arithmetic number, because the mean of its divisors is an integer number (356331518).

Almost surely, 2^1068994551 is an apocalyptic number.

1068994551 is a deficient number, since it is larger than the sum of its proper divisors (356331521).

1068994551 is an equidigital number, since it uses as much as digits as its factorization.

1068994551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356331520.

The product of its (nonzero) digits is 388800, while the sum is 48.

The square root of 1068994551 is about 32695.4821190941. The cubic root of 1068994551 is about 1022.4886530186.

The spelling of 1068994551 in words is "one billion, sixty-eight million, nine hundred ninety-four thousand, five hundred fifty-one".