1293640620550 has 48 divisors (see below), whose sum is σ = 2532972142800. Its totient is φ = 490190745600.

The previous prime is 1293640620527. The next prime is 1293640620553. The reversal of 1293640620550 is 550260463921.

It is a junction number, because it is equal to n+sod(n) for n = 1293640620497 and 1293640620506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293640620553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19842406 + ... + 19907494.

It is an arithmetic number, because the mean of its divisors is an integer number (52770252975).

Almost surely, 2^{1293640620550} is an apocalyptic number.

1293640620550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1293640620550 is a deficient number, since it is larger than the sum of its proper divisors (1239331522250).

1293640620550 is a wasteful number, since it uses less digits than its factorization.

1293640620550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86041 (or 86036 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 1293640620550 in words is "one trillion, two hundred ninety-three billion, six hundred forty million, six hundred twenty thousand, five hundred fifty".