157756835321 has 4 divisors (see below), whose sum is σ = 157885198500. Its totient is φ = 157628472144.

The previous prime is 157756835311. The next prime is 157756835333. The reversal of 157756835321 is 123538657751.

157756835321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76837068025 + 80919767296 = 277195^2 + 284464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157756835321 is a prime.

It is a super-2 number, since 2×157756835321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157756835311) 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 3 ways as a sum of consecutive naturals, for example, 64179746 + ... + 64182203.

It is an arithmetic number, because the mean of its divisors is an integer number (39471299625).

Almost surely, 2^157756835321 is an apocalyptic number.

It is an amenable number.

157756835321 is a deficient number, since it is larger than the sum of its proper divisors (128363179).

157756835321 is a wasteful number, since it uses less digits than its factorization.

157756835321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128363178.

The product of its digits is 5292000, while the sum is 53.

The spelling of 157756835321 in words is "one hundred fifty-seven billion, seven hundred fifty-six million, eight hundred thirty-five thousand, three hundred twenty-one".