2157726601851 has 8 divisors (see below), whose sum is σ = 2876996455440. Its totient is φ = 1438470574752.

The previous prime is 2157726601847. The next prime is 2157726601879. The reversal of 2157726601851 is 1581066277512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2157726601851 - 2² = 2157726601847 is a prime.

It is a super-3 number, since 3×2157726601851³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2157726601794 and 2157726601803.

It is not an unprimeable number, because it can be changed into a prime (2157726601841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086836 + ... + 3720753.

It is an arithmetic number, because the mean of its divisors is an integer number (359624556930).

Almost surely, 2^{2157726601851} is an apocalyptic number.

2157726601851 is a deficient number, since it is larger than the sum of its proper divisors (719269853589).

2157726601851 is a wasteful number, since it uses less digits than its factorization.

2157726601851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913245.

The product of its (nonzero) digits is 1411200, while the sum is 51.

The spelling of 2157726601851 in words is "two trillion, one hundred fifty-seven billion, seven hundred twenty-six million, six hundred one thousand, eight hundred fifty-one".