157721544512 has 56 divisors (see below), whose sum is σ = 357809084736. Its totient is φ = 67572430848.

The previous prime is 157721544481. The next prime is 157721544517. The reversal of 157721544512 is 215445127751.

157721544512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×157721544512³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157721544517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324088 + ... + 1438280.

Almost surely, 2^157721544512 is an apocalyptic number.

It is an amenable number.

157721544512 is an abundant number, since it is smaller than the sum of its proper divisors (200087540224).

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

157721544512 is a wasteful number, since it uses less digits than its factorization.

157721544512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117295 (or 117285 counting only the distinct ones).

The product of its digits is 392000, while the sum is 44.

The spelling of 157721544512 in words is "one hundred fifty-seven billion, seven hundred twenty-one million, five hundred forty-four thousand, five hundred twelve".