30642631357 has 4 divisors (see below), whose sum is σ = 32999756860. Its totient is φ = 28285505856.

The previous prime is 30642631343. The next prime is 30642631363. The reversal of 30642631357 is 75313624603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14345811076 + 16296820281 = 119774^2 + 127659^2 .

It is a cyclic number.

It is not a de Polignac number, because 30642631357 - 2¹¹ = 30642629309 is a prime.

It is a super-2 number, since 2×30642631357² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30642634357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178562732 + ... + 1178562757.

It is an arithmetic number, because the mean of its divisors is an integer number (8249939215).

Almost surely, 2^30642631357 is an apocalyptic number.

It is an amenable number.

30642631357 is a deficient number, since it is larger than the sum of its proper divisors (2357125503).

30642631357 is a wasteful number, since it uses less digits than its factorization.

30642631357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357125502.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 30642631357 in words is "thirty billion, six hundred forty-two million, six hundred thirty-one thousand, three hundred fifty-seven".