4951509657 has 4 divisors (see below), whose sum is σ = 6602012880. Its totient is φ = 3301006436.

The previous prime is 4951509653. The next prime is 4951509691. The reversal of 4951509657 is 7569051594.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4951509657 - 2² = 4951509653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4951509653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825251607 + ... + 825251612.

It is an arithmetic number, because the mean of its divisors is an integer number (1650503220).

Almost surely, 2^4951509657 is an apocalyptic number.

It is an amenable number.

4951509657 is a deficient number, since it is larger than the sum of its proper divisors (1650503223).

4951509657 is a wasteful number, since it uses less digits than its factorization.

4951509657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650503222.

The product of its (nonzero) digits is 1701000, while the sum is 51.

The square root of 4951509657 is about 70366.9642445942. The cubic root of 4951509657 is about 1704.4301586957.

The spelling of 4951509657 in words is "four billion, nine hundred fifty-one million, five hundred nine thousand, six hundred fifty-seven".