1264415551 has 6 divisors (see below), whose sum is σ = 1470850800. Its totient is φ = 1083784716.

The previous prime is 1264415549. The next prime is 1264415557. The reversal of 1264415551 is 1555144621.

It is not a de Polignac number, because 1264415551 - 2¹ = 1264415549 is a prime.

It is a super-2 number, since 2×1264415551² = 3197493371221267202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264415557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12902151 + ... + 12902248.

It is an arithmetic number, because the mean of its divisors is an integer number (245141800).

Almost surely, 2^1264415551 is an apocalyptic number.

1264415551 is a deficient number, since it is larger than the sum of its proper divisors (206435249).

1264415551 is an equidigital number, since it uses as much as digits as its factorization.

1264415551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25804413 (or 25804406 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 1264415551 is about 35558.6213315421. The cubic root of 1264415551 is about 1081.3425094382.

The spelling of 1264415551 in words is "one billion, two hundred sixty-four million, four hundred fifteen thousand, five hundred fifty-one".