137640287648 has 12 divisors (see below), whose sum is σ = 270979316370. Its totient is φ = 68820143808.

The previous prime is 137640287569. The next prime is 137640287731. The reversal of 137640287648 is 846782046731.

It can be written as a sum of positive squares in only one way, i.e., 78954256144 + 58686031504 = 280988^2 + 242252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 137640287593 and 137640287602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2150629463 + ... + 2150629526.

Almost surely, 2^137640287648 is an apocalyptic number.

It is an amenable number.

137640287648 is a deficient number, since it is larger than the sum of its proper divisors (133339028722).

137640287648 is an equidigital number, since it uses as much as digits as its factorization.

137640287648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301258999 (or 4301258991 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 137640287648 in words is "one hundred thirty-seven billion, six hundred forty million, two hundred eighty-seven thousand, six hundred forty-eight".