1268107557 has 16 divisors (see below), whose sum is σ = 1783800000. Its totient is φ = 799110144.

The previous prime is 1268107543. The next prime is 1268107567. The reversal of 1268107557 is 7557018621.

It is not a de Polignac number, because 1268107557 - 2⁶ = 1268107493 is a prime.

It is a super-2 number, since 2×1268107557² = 3216193552241016498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268107567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819 + ... + 50367.

It is an arithmetic number, because the mean of its divisors is an integer number (111487500).

Almost surely, 2^1268107557 is an apocalyptic number.

It is an amenable number.

1268107557 is a deficient number, since it is larger than the sum of its proper divisors (515692443).

1268107557 is a wasteful number, since it uses less digits than its factorization.

1268107557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50020.

The product of its (nonzero) digits is 117600, while the sum is 42.

The square root of 1268107557 is about 35610.4978482469. The cubic root of 1268107557 is about 1082.3939684968.

The spelling of 1268107557 in words is "one billion, two hundred sixty-eight million, one hundred seven thousand, five hundred fifty-seven".