157781994073622 has 32 divisors (see below), whose sum is σ = 243592419640320. Its totient is φ = 76593714173280.

The previous prime is 157781994073601. The next prime is 157781994073633. The reversal of 157781994073622 is 226370499187751.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595750313 + ... + 596015099.

It is an arithmetic number, because the mean of its divisors is an integer number (7612263113760).

It is a 1-persistent number, because it is pandigital, but 2⋅157781994073622 = 315563988147244 is not.

Almost surely, 2^{157781994073622} is an apocalyptic number.

157781994073622 is a deficient number, since it is larger than the sum of its proper divisors (85810425566698).

157781994073622 is a wasteful number, since it uses less digits than its factorization.

157781994073622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282116.

The product of its (nonzero) digits is 320060160, while the sum is 71.

The spelling of 157781994073622 in words is "one hundred fifty-seven trillion, seven hundred eighty-one billion, nine hundred ninety-four million, seventy-three thousand, six hundred twenty-two".