14720947657 has 8 divisors (see below), whose sum is σ = 16010293320. Its totient is φ = 13454025600.

The previous prime is 14720947651. The next prime is 14720947663. The reversal of 14720947657 is 75674902741.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (14720947651) and next prime (14720947663).

It can be written as a sum of positive squares in 4 ways, for example, as 3251394441 + 11469553216 = 57021^2 + 107096^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14720947657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14720947651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5604532 + ... + 5607157.

It is an arithmetic number, because the mean of its divisors is an integer number (2001286665).

Almost surely, 2^14720947657 is an apocalyptic number.

It is an amenable number.

14720947657 is a deficient number, since it is larger than the sum of its proper divisors (1289345663).

14720947657 is a wasteful number, since it uses less digits than its factorization.

14720947657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211803.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 14720947657 in words is "fourteen billion, seven hundred twenty million, nine hundred forty-seven thousand, six hundred fifty-seven".