157665197312 has 54 divisors (see below), whose sum is σ = 366096505698. Its totient is φ = 67570793472.

The previous prime is 157665197311. The next prime is 157665197323. The reversal of 157665197312 is 213791566751.

It can be written as a sum of positive squares in only one way, i.e., 157018817536 + 646379776 = 396256^2 + 25424^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157665197311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6271943 + ... + 6297030.

Almost surely, 2^157665197312 is an apocalyptic number.

It is an amenable number.

157665197312 is an abundant number, since it is smaller than the sum of its proper divisors (208431308386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157665197312 is an equidigital number, since it uses as much as digits as its factorization.

157665197312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12569003 (or 12568982 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 53.

The spelling of 157665197312 in words is "one hundred fifty-seven billion, six hundred sixty-five million, one hundred ninety-seven thousand, three hundred twelve".