1868126377 has 4 divisors (see below), whose sum is σ = 2011828420. Its totient is φ = 1724424336.

The previous prime is 1868126363. The next prime is 1868126387. The reversal of 1868126377 is 7736218681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7736218681 = 1201 ⋅6441481.

It can be written as a sum of positive squares in 2 ways, for example, as 596776041 + 1271350336 = 24429^2 + 35656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1868126377 - 2¹⁹ = 1867602089 is a prime.

It is a super-2 number, since 2×1868126377² = 6979792320886292258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868126377.

It is not an unprimeable number, because it can be changed into a prime (1868126327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71851002 + ... + 71851027.

It is an arithmetic number, because the mean of its divisors is an integer number (502957105).

Almost surely, 2^1868126377 is an apocalyptic number.

It is an amenable number.

1868126377 is a deficient number, since it is larger than the sum of its proper divisors (143702043).

1868126377 is a wasteful number, since it uses less digits than its factorization.

1868126377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143702042.

The product of its digits is 677376, while the sum is 49.

The square root of 1868126377 is about 43221.8275527539. The cubic root of 1868126377 is about 1231.5973643599.

The spelling of 1868126377 in words is "one billion, eight hundred sixty-eight million, one hundred twenty-six thousand, three hundred seventy-seven".