2108557934242 has 4 divisors (see below), whose sum is σ = 3162836901366. Its totient is φ = 1054278967120.

The previous prime is 2108557934233. The next prime is 2108557934243. The reversal of 2108557934242 is 2424397558012.

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

It can be written as a sum of positive squares in only one way, i.e., 1721971193121 + 386586741121 = 1312239^2 + 621761^2 .

It is a super-2 number, since 2×2108557934242² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2108557934242.

It is not an unprimeable number, because it can be changed into a prime (2108557934243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527139483559 + ... + 527139483562.

Almost surely, 2^{2108557934242} is an apocalyptic number.

2108557934242 is a deficient number, since it is larger than the sum of its proper divisors (1054278967124).

2108557934242 is a wasteful number, since it uses less digits than its factorization.

2108557934242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054278967123.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 2108557934242 in words is "two trillion, one hundred eight billion, five hundred fifty-seven million, nine hundred thirty-four thousand, two hundred forty-two".