2157255967471 has 8 divisors (see below), whose sum is σ = 2354078392704. Its totient is φ = 1960551583320.

The previous prime is 2157255967453. The next prime is 2157255967507. The reversal of 2157255967471 is 1747695527512.

It is a happy number.

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

It is not a de Polignac number, because 2157255967471 - 2¹³ = 2157255959279 is a prime.

It is a super-3 number, since 3×2157255967471³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157255967411) 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, 29472051 + ... + 29545156.

It is an arithmetic number, because the mean of its divisors is an integer number (294259799088).

Almost surely, 2^{2157255967471} is an apocalyptic number.

2157255967471 is a deficient number, since it is larger than the sum of its proper divisors (196822425233).

2157255967471 is a wasteful number, since it uses less digits than its factorization.

2157255967471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59020541.

The product of its digits is 37044000, while the sum is 61.

The spelling of 2157255967471 in words is "two trillion, one hundred fifty-seven billion, two hundred fifty-five million, nine hundred sixty-seven thousand, four hundred seventy-one".