1918124641 has 8 divisors (see below), whose sum is σ = 1990739520. Its totient is φ = 1845941328.

The previous prime is 1918124627. The next prime is 1918124683. The reversal of 1918124641 is 1464218191.

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

It is a cyclic number.

It is not a de Polignac number, because 1918124641 - 2⁵ = 1918124609 is a prime.

It is a super-2 number, since 2×1918124641² = 7358404276822757762, 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 1918124641.

It is not an unprimeable number, because it can be changed into a prime (1918122641) 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, 98821 + ... + 116626.

It is an arithmetic number, because the mean of its divisors is an integer number (248842440).

Almost surely, 2^1918124641 is an apocalyptic number.

It is an amenable number.

1918124641 is a deficient number, since it is larger than the sum of its proper divisors (72614879).

1918124641 is a wasteful number, since it uses less digits than its factorization.

1918124641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215783.

The product of its digits is 13824, while the sum is 37.

The square root of 1918124641 is about 43796.3998634591. The cubic root of 1918124641 is about 1242.4882055270.

The spelling of 1918124641 in words is "one billion, nine hundred eighteen million, one hundred twenty-four thousand, six hundred forty-one".