30781007853 has 4 divisors (see below), whose sum is σ = 41041343808. Its totient is φ = 20520671900.

The previous prime is 30781007843. The next prime is 30781007861. The reversal of 30781007853 is 35870018703.

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: 35870018703 = 3 ⋅11956672901.

It is a cyclic number.

It is not a de Polignac number, because 30781007853 - 2⁵ = 30781007821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30781007833) 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, 5130167973 + ... + 5130167978.

It is an arithmetic number, because the mean of its divisors is an integer number (10260335952).

Almost surely, 2^30781007853 is an apocalyptic number.

It is an amenable number.

30781007853 is a deficient number, since it is larger than the sum of its proper divisors (10260335955).

30781007853 is a wasteful number, since it uses less digits than its factorization.

30781007853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260335954.

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 30781007853 in words is "thirty billion, seven hundred eighty-one million, seven thousand, eight hundred fifty-three".