1387590065650 has 12 divisors (see below), whose sum is σ = 2580917522202. Its totient is φ = 555036026240.

The previous prime is 1387590065623. The next prime is 1387590065723. The reversal of 1387590065650 is 565600957831.

It can be written as a sum of positive squares in 3 ways, for example, as 1301029953129 + 86560112521 = 1140627^2 + 294211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1387590065591 and 1387590065600.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13875900607 + ... + 13875900706.

Almost surely, 2^{1387590065650} is an apocalyptic number.

1387590065650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387590065650 is a deficient number, since it is larger than the sum of its proper divisors (1193327456552).

1387590065650 is a wasteful number, since it uses less digits than its factorization.

1387590065650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27751801325 (or 27751801320 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 1387590065650 in words is "one trillion, three hundred eighty-seven billion, five hundred ninety million, sixty-five thousand, six hundred fifty".