137647389981 has 16 divisors (see below), whose sum is σ = 196212392064. Its totient is φ = 85528472064.

The previous prime is 137647389961. The next prime is 137647389989. The reversal of 137647389981 is 189983746731.

It is not a de Polignac number, because 137647389981 - 2¹⁴ = 137647373597 is a prime.

It is a super-2 number, since 2×137647389981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137647389989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13096536 + ... + 13107041.

It is an arithmetic number, because the mean of its divisors is an integer number (12263274504).

Almost surely, 2^137647389981 is an apocalyptic number.

It is an amenable number.

137647389981 is a deficient number, since it is larger than the sum of its proper divisors (58565002083).

137647389981 is a wasteful number, since it uses less digits than its factorization.

137647389981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26203700.

The product of its digits is 54867456, while the sum is 66.

The spelling of 137647389981 in words is "one hundred thirty-seven billion, six hundred forty-seven million, three hundred eighty-nine thousand, nine hundred eighty-one".