13679740642 has 32 divisors (see below), whose sum is σ = 22278041712. Its totient is φ = 6275702784.

The previous prime is 13679740637. The next prime is 13679740643. The reversal of 13679740642 is 24604797631.

It can be written as a sum of positive squares in 8 ways, for example, as 5155096401 + 8524644241 = 71799^2 + 92329^2 .

It is not an unprimeable number, because it can be changed into a prime (13679740643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258738 + ... + 307090.

Almost surely, 2^13679740642 is an apocalyptic number.

13679740642 is a deficient number, since it is larger than the sum of its proper divisors (8598301070).

13679740642 is a wasteful number, since it uses less digits than its factorization.

13679740642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48582.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 13679740642 in words is "thirteen billion, six hundred seventy-nine million, seven hundred forty thousand, six hundred forty-two".