1268694550 has 24 divisors (see below), whose sum is σ = 2361730536. Its totient is φ = 507056640.

The previous prime is 1268694533. The next prime is 1268694551. The reversal of 1268694550 is 554968621.

It is a super-2 number, since 2×1268694550² = 3219171722399405000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1268694550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268694551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54262 + ... + 74038.

It is an arithmetic number, because the mean of its divisors is an integer number (98405439).

Almost surely, 2^1268694550 is an apocalyptic number.

1268694550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1268694550 is a deficient number, since it is larger than the sum of its proper divisors (1093035986).

1268694550 is a wasteful number, since it uses less digits than its factorization.

1268694550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072 (or 21067 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 1268694550 is about 35618.7387480242. The cubic root of 1268694550 is about 1082.5609521440.

The spelling of 1268694550 in words is "one billion, two hundred sixty-eight million, six hundred ninety-four thousand, five hundred fifty".