137438917706 has 16 divisors (see below), whose sum is σ = 219073388616. Its totient is φ = 64443641856.

The previous prime is 137438917673. The next prime is 137438917709. The reversal of 137438917706 is 607719834731.

It can be written as a sum of positive squares in 4 ways, for example, as 122296384681 + 15142533025 = 349709^2 + 123055^2 .

It is a super-2 number, since 2×137438917706² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137438917709) 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, 7287191 + ... + 7306026.

Almost surely, 2^137438917706 is an apocalyptic number.

137438917706 is a deficient number, since it is larger than the sum of its proper divisors (81634470910).

137438917706 is a wasteful number, since it uses less digits than its factorization.

137438917706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14593513.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 137438917706 in words is "one hundred thirty-seven billion, four hundred thirty-eight million, nine hundred seventeen thousand, seven hundred six".