30157456661 has 2 divisors, whose sum is σ = 30157456662. Its totient is φ = 30157456660.

The previous prime is 30157456649. The next prime is 30157456669. The reversal of 30157456661 is 16665475103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23052652561 + 7104804100 = 151831^2 + 84290^2 .

It is a cyclic number.

It is not a de Polignac number, because 30157456661 - 2²² = 30153262357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30157456669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15078728330 + 15078728331.

It is an arithmetic number, because the mean of its divisors is an integer number (15078728331).

Almost surely, 2^30157456661 is an apocalyptic number.

It is an amenable number.

30157456661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30157456661 is an equidigital number, since it uses as much as digits as its factorization.

30157456661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 30157456661 in words is "thirty billion, one hundred fifty-seven million, four hundred fifty-six thousand, six hundred sixty-one".