30636742657 has 4 divisors (see below), whose sum is σ = 30637821376. Its totient is φ = 30635663940.

The previous prime is 30636742639. The next prime is 30636742667. The reversal of 30636742657 is 75624763603.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75624763603 = 61 ⋅1239750223.

It is a cyclic number.

It is not a de Polignac number, because 30636742657 - 2¹¹ = 30636740609 is a prime.

It is a super-2 number, since 2×30636742657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30636742657.

It is not an unprimeable number, because it can be changed into a prime (30636742667) 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, 495573 + ... + 553954.

It is an arithmetic number, because the mean of its divisors is an integer number (7659455344).

Almost surely, 2^30636742657 is an apocalyptic number.

It is an amenable number.

30636742657 is a deficient number, since it is larger than the sum of its proper divisors (1078719).

30636742657 is a wasteful number, since it uses less digits than its factorization.

30636742657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078718.

The product of its (nonzero) digits is 3810240, while the sum is 49.

The spelling of 30636742657 in words is "thirty billion, six hundred thirty-six million, seven hundred forty-two thousand, six hundred fifty-seven".