2671639745 has 16 divisors (see below), whose sum is σ = 3298316112. Its totient is φ = 2076195840.

The previous prime is 2671639697. The next prime is 2671639757. The reversal of 2671639745 is 5479361762.

It can be written as a sum of positive squares in 8 ways, for example, as 1020355249 + 1651284496 = 31943^2 + 40636^2 .

It is not a de Polignac number, because 2671639745 - 2¹⁰ = 2671638721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2671639693 and 2671639702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19799 + ... + 75731.

It is an arithmetic number, because the mean of its divisors is an integer number (206144757).

Almost surely, 2^2671639745 is an apocalyptic number.

It is an amenable number.

2671639745 is a deficient number, since it is larger than the sum of its proper divisors (626676367).

2671639745 is a wasteful number, since it uses less digits than its factorization.

2671639745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56212.

The product of its digits is 1905120, while the sum is 50.

The square root of 2671639745 is about 51687.9071447084. The cubic root of 2671639745 is about 1387.5840483675.

The spelling of 2671639745 in words is "two billion, six hundred seventy-one million, six hundred thirty-nine thousand, seven hundred forty-five".