30764728457 has 4 divisors (see below), whose sum is σ = 31135387920. Its totient is φ = 30394068996.

The previous prime is 30764728429. The next prime is 30764728481. The reversal of 30764728457 is 75482746703.

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 30764728457 - 2¹⁴ = 30764712073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30764728399 and 30764728408.

It is not an unprimeable number, because it can be changed into a prime (30764724457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185329607 + ... + 185329772.

It is an arithmetic number, because the mean of its divisors is an integer number (7783846980).

Almost surely, 2^30764728457 is an apocalyptic number.

It is an amenable number.

30764728457 is a deficient number, since it is larger than the sum of its proper divisors (370659463).

30764728457 is an equidigital number, since it uses as much as digits as its factorization.

30764728457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370659462.

The product of its (nonzero) digits is 7902720, while the sum is 53.

The spelling of 30764728457 in words is "thirty billion, seven hundred sixty-four million, seven hundred twenty-eight thousand, four hundred fifty-seven".