30645885997 has 2 divisors, whose sum is σ = 30645885998. Its totient is φ = 30645885996.

The previous prime is 30645885983. The next prime is 30645886079. The reversal of 30645885997 is 79958854603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23046579721 + 7599306276 = 151811^2 + 87174^2 .

It is a cyclic number.

It is not a de Polignac number, because 30645885997 - 2⁷ = 30645885869 is a prime.

It is a super-2 number, since 2×30645885997² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30645885097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322942998 + 15322942999.

It is an arithmetic number, because the mean of its divisors is an integer number (15322942999).

Almost surely, 2^30645885997 is an apocalyptic number.

It is an amenable number.

30645885997 is a deficient number, since it is larger than the sum of its proper divisors (1).

30645885997 is an equidigital number, since it uses as much as digits as its factorization.

30645885997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 30645885997 in words is "thirty billion, six hundred forty-five million, eight hundred eighty-five thousand, nine hundred ninety-seven".