1249857449552 has 10 divisors (see below), whose sum is σ = 2421598808538. Its totient is φ = 624928724768.

The previous prime is 1249857449527. The next prime is 1249857449557. The reversal of 1249857449552 is 2559447589421.

It can be written as a sum of positive squares in only one way, i.e., 1161859786816 + 87997662736 = 1077896^2 + 296644^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249857449557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39058045283 + ... + 39058045314.

Almost surely, 2^{1249857449552} is an apocalyptic number.

It is an amenable number.

1249857449552 is a deficient number, since it is larger than the sum of its proper divisors (1171741358986).

1249857449552 is an equidigital number, since it uses as much as digits as its factorization.

1249857449552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78116090605 (or 78116090599 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 65.

The spelling of 1249857449552 in words is "one trillion, two hundred forty-nine billion, eight hundred fifty-seven million, four hundred forty-nine thousand, five hundred fifty-two".