1561055016650 has 24 divisors (see below), whose sum is σ = 3056381402880. Its totient is φ = 591557690160.

The previous prime is 1561055016637. The next prime is 1561055016751. The reversal of 1561055016650 is 566105501651.

It is a junction number, because it is equal to n+sod(n) for n = 1561055016598 and 1561055016607.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821606954 + ... + 821608853.

It is an arithmetic number, because the mean of its divisors is an integer number (127349225120).

Almost surely, 2^{1561055016650} is an apocalyptic number.

1561055016650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561055016650 is a deficient number, since it is larger than the sum of its proper divisors (1495326386230).

1561055016650 is a wasteful number, since it uses less digits than its factorization.

1561055016650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643215838 (or 1643215833 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 1561055016650 in words is "one trillion, five hundred sixty-one billion, fifty-five million, sixteen thousand, six hundred fifty".