1252777637764 has 12 divisors (see below), whose sum is σ = 2228301208588. Its totient is φ = 616120149600.

The previous prime is 1252777637759. The next prime is 1252777637789. The reversal of 1252777637764 is 4677367772521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 325778392900 + 926999244864 = 570770^2 + 962808^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1252777637696 and 1252777637705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567167047 + ... + 2567167534.

Almost surely, 2^{1252777637764} is an apocalyptic number.

It is an amenable number.

1252777637764 is a deficient number, since it is larger than the sum of its proper divisors (975523570824).

1252777637764 is a wasteful number, since it uses less digits than its factorization.

1252777637764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134334646 (or 5134334644 counting only the distinct ones).

The product of its digits is 145212480, while the sum is 64.

The spelling of 1252777637764 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-seven million, six hundred thirty-seven thousand, seven hundred sixty-four".