30897236765 has 8 divisors (see below), whose sum is σ = 37162314168. Its totient is φ = 24660702720.

The previous prime is 30897236759. The next prime is 30897236809. The reversal of 30897236765 is 56763279803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1257482521 + 29639754244 = 35461^2 + 172162^2 .

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

It is not a de Polignac number, because 30897236765 - 2¹⁰ = 30897235741 is a prime.

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 30897236765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7133456 + ... + 7137785.

It is an arithmetic number, because the mean of its divisors is an integer number (4645289271).

Almost surely, 2^30897236765 is an apocalyptic number.

It is an amenable number.

30897236765 is a deficient number, since it is larger than the sum of its proper divisors (6265077403).

30897236765 is a wasteful number, since it uses less digits than its factorization.

30897236765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271679.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 30897236765 in words is "thirty billion, eight hundred ninety-seven million, two hundred thirty-six thousand, seven hundred sixty-five".