1451696649 has 24 divisors (see below), whose sum is σ = 2114572320. Its totient is φ = 885411072.

The previous prime is 1451696639. The next prime is 1451696671. The reversal of 1451696649 is 9466961541.

It is a happy number.

It is not a de Polignac number, because 1451696649 - 2⁴ = 1451696633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1451696639) 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, 44622 + ... + 69960.

It is an arithmetic number, because the mean of its divisors is an integer number (88107180).

Almost surely, 2^1451696649 is an apocalyptic number.

It is an amenable number.

1451696649 is a deficient number, since it is larger than the sum of its proper divisors (662875671).

1451696649 is a wasteful number, since it uses less digits than its factorization.

1451696649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25481 (or 25468 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 1451696649 is about 38101.1371090155. The cubic root of 1451696649 is about 1132.2924846256.

The spelling of 1451696649 in words is "one billion, four hundred fifty-one million, six hundred ninety-six thousand, six hundred forty-nine".