157211031202661 has 8 divisors (see below), whose sum is σ = 157427413652544. Its totient is φ = 156994674469920.

The previous prime is 157211031202637. The next prime is 157211031202727. The reversal of 157211031202661 is 166202130112751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157211031202661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157211031202861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5821346 + ... + 18663068.

It is an arithmetic number, because the mean of its divisors is an integer number (19678426706568).

Almost surely, 2^{157211031202661} is an apocalyptic number.

It is an amenable number.

157211031202661 is a deficient number, since it is larger than the sum of its proper divisors (216382449883).

157211031202661 is a wasteful number, since it uses less digits than its factorization.

157211031202661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858571.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 157211031202661 in words is "one hundred fifty-seven trillion, two hundred eleven billion, thirty-one million, two hundred two thousand, six hundred sixty-one".