157719925848221 has 32 divisors (see below), whose sum is σ = 177702572974080. Its totient is φ = 138682951070400.

The previous prime is 157719925848179. The next prime is 157719925848239. The reversal of 157719925848221 is 122848529917751.

It is a happy number.

It is not a de Polignac number, because 157719925848221 - 2⁶ = 157719925848157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157719925848241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6469487210 + ... + 6469511588.

It is an arithmetic number, because the mean of its divisors is an integer number (5553205405440).

Almost surely, 2^{157719925848221} is an apocalyptic number.

157719925848221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157719925848221 is a deficient number, since it is larger than the sum of its proper divisors (19982647125859).

157719925848221 is a wasteful number, since it uses less digits than its factorization.

157719925848221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33705.

The product of its digits is 203212800, while the sum is 71.

The spelling of 157719925848221 in words is "one hundred fifty-seven trillion, seven hundred nineteen billion, nine hundred twenty-five million, eight hundred forty-eight thousand, two hundred twenty-one".