30312815645 has 32 divisors (see below), whose sum is σ = 43021152000. Its totient is φ = 20061812736.

The previous prime is 30312815639. The next prime is 30312815677. The reversal of 30312815645 is 54651821303.

It is a happy number.

It is not a de Polignac number, because 30312815645 - 2⁴ = 30312815629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30312815599 and 30312815608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5172557 + ... + 5178413.

It is an arithmetic number, because the mean of its divisors is an integer number (1344411000).

Almost surely, 2^30312815645 is an apocalyptic number.

30312815645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30312815645 is a deficient number, since it is larger than the sum of its proper divisors (12708336355).

30312815645 is a wasteful number, since it uses less digits than its factorization.

30312815645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 30312815645 in words is "thirty billion, three hundred twelve million, eight hundred fifteen thousand, six hundred forty-five".