1344557761 has 24 divisors (see below), whose sum is σ = 1483188224. Its totient is φ = 1217341440.

The previous prime is 1344557741. The next prime is 1344557771. The reversal of 1344557761 is 1677554431.

It is not a de Polignac number, because 1344557761 - 2⁵ = 1344557729 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1344557701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1997521 + ... + 1998193.

Almost surely, 2^1344557761 is an apocalyptic number.

It is an amenable number.

1344557761 is a deficient number, since it is larger than the sum of its proper divisors (138630463).

1344557761 is a wasteful number, since it uses less digits than its factorization.

1344557761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 944 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 1344557761 is about 36668.2118598658. The cubic root of 1344557761 is about 1103.7223101840.

The spelling of 1344557761 in words is "one billion, three hundred forty-four million, five hundred fifty-seven thousand, seven hundred sixty-one".