2138779601 has 8 divisors (see below), whose sum is σ = 2446698624. Its totient is φ = 1831455360.

The previous prime is 2138779597. The next prime is 2138779627. The reversal of 2138779601 is 1069778312.

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

It is not a de Polignac number, because 2138779601 - 2² = 2138779597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138779501) 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, 140960 + ... + 155393.

It is an arithmetic number, because the mean of its divisors is an integer number (305837328).

Almost surely, 2^2138779601 is an apocalyptic number.

It is an amenable number.

2138779601 is a deficient number, since it is larger than the sum of its proper divisors (307919023).

2138779601 is a wasteful number, since it uses less digits than its factorization.

2138779601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297391.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 2138779601 is about 46246.9415313056. The cubic root of 2138779601 is about 1288.4137305653.

The spelling of 2138779601 in words is "two billion, one hundred thirty-eight million, seven hundred seventy-nine thousand, six hundred one".