1249713440648 has 8 divisors (see below), whose sum is σ = 2343212701230. Its totient is φ = 624856720320.

The previous prime is 1249713440621. The next prime is 1249713440699. The reversal of 1249713440648 is 8460443179421.

It can be written as a sum of positive squares in only one way, i.e., 683098944004 + 566614496644 = 826498^2 + 752738^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1249713440648³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1249713440648.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78107090033 + ... + 78107090048.

Almost surely, 2^{1249713440648} is an apocalyptic number.

It is an amenable number.

1249713440648 is a deficient number, since it is larger than the sum of its proper divisors (1093499260582).

1249713440648 is a wasteful number, since it uses less digits than its factorization.

1249713440648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156214180087 (or 156214180083 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 1249713440648 in words is "one trillion, two hundred forty-nine billion, seven hundred thirteen million, four hundred forty thousand, six hundred forty-eight".