2157748395263 has 4 divisors (see below), whose sum is σ = 2158865822568. Its totient is φ = 2156630967960.

The previous prime is 2157748395251. The next prime is 2157748395331. The reversal of 2157748395263 is 3625938477512.

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

It is a cyclic number.

It is not a de Polignac number, because 2157748395263 - 2¹⁸ = 2157748133119 is a prime.

It is a super-3 number, since 3×2157748395263³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2157748395196 and 2157748395205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157748395863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558710756 + ... + 558714617.

It is an arithmetic number, because the mean of its divisors is an integer number (539716455642).

Almost surely, 2^{2157748395263} is an apocalyptic number.

2157748395263 is a deficient number, since it is larger than the sum of its proper divisors (1117427305).

2157748395263 is a wasteful number, since it uses less digits than its factorization.

2157748395263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117427304.

The product of its digits is 76204800, while the sum is 62.

The spelling of 2157748395263 in words is "two trillion, one hundred fifty-seven billion, seven hundred forty-eight million, three hundred ninety-five thousand, two hundred sixty-three".