157122020661 has 8 divisors (see below), whose sum is σ = 209498825760. Its totient is φ = 104746614672.

The previous prime is 157122020659. The next prime is 157122020681. The reversal of 157122020661 is 166020221751.

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

It is not a de Polignac number, because 157122020661 - 2¹ = 157122020659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157122020681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51370 + ... + 562923.

It is an arithmetic number, because the mean of its divisors is an integer number (26187353220).

Almost surely, 2^157122020661 is an apocalyptic number.

It is an amenable number.

157122020661 is a deficient number, since it is larger than the sum of its proper divisors (52376805099).

157122020661 is an equidigital number, since it uses as much as digits as its factorization.

157122020661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699555.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 157122020661 in words is "one hundred fifty-seven billion, one hundred twenty-two million, twenty thousand, six hundred sixty-one".