157720221943361 has 16 divisors (see below), whose sum is σ = 196638764876928. Its totient is φ = 122898520435200.

The previous prime is 157720221943337. The next prime is 157720221943387. The reversal of 157720221943361 is 163349122027751.

It is a cyclic number.

It is not a de Polignac number, because 157720221943361 - 2³⁴ = 157703042074177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157720221933361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25777841 + ... + 31303953.

It is an arithmetic number, because the mean of its divisors is an integer number (12289922804808).

Almost surely, 2^{157720221943361} is an apocalyptic number.

157720221943361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157720221943361 is a deficient number, since it is larger than the sum of its proper divisors (38918542933567).

157720221943361 is a wasteful number, since it uses less digits than its factorization.

157720221943361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5896792.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 157720221943361 in words is "one hundred fifty-seven trillion, seven hundred twenty billion, two hundred twenty-one million, nine hundred forty-three thousand, three hundred sixty-one".