1266351564 has 48 divisors (see below), whose sum is σ = 2985167360. Its totient is φ = 417804480.

The previous prime is 1266351557. The next prime is 1266351571. The reversal of 1266351564 is 4651536621.

It is an interprime number because it is at equal distance from previous prime (1266351557) and next prime (1266351571).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528882 + ... + 531270.

Almost surely, 2^1266351564 is an apocalyptic number.

It is an amenable number.

1266351564 is an abundant number, since it is smaller than the sum of its proper divisors (1718815796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266351564 is a wasteful number, since it uses less digits than its factorization.

1266351564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830 (or 2828 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 1266351564 is about 35585.8337544591. The cubic root of 1266351564 is about 1081.8941280829.

The spelling of 1266351564 in words is "one billion, two hundred sixty-six million, three hundred fifty-one thousand, five hundred sixty-four".