1257766063 has 16 divisors (see below), whose sum is σ = 1403191296. Its totient is φ = 1121281920.

The previous prime is 1257766057. The next prime is 1257766073. The reversal of 1257766063 is 3606677521.

It is not a de Polignac number, because 1257766063 - 2²⁵ = 1224211631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257766033) 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, 24658 + ... + 55888.

It is an arithmetic number, because the mean of its divisors is an integer number (87699456).

Almost surely, 2^1257766063 is an apocalyptic number.

1257766063 is a deficient number, since it is larger than the sum of its proper divisors (145425233).

1257766063 is a wasteful number, since it uses less digits than its factorization.

1257766063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31374.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 1257766063 is about 35464.9977160580. The cubic root of 1257766063 is about 1079.4436042940.

The spelling of 1257766063 in words is "one billion, two hundred fifty-seven million, seven hundred sixty-six thousand, sixty-three".