120781763650 has 24 divisors (see below), whose sum is σ = 224792821044. Its totient is φ = 48282868800.

The previous prime is 120781763639. The next prime is 120781763657. The reversal of 120781763650 is 56367187021.

It can be written as a sum of positive squares in 6 ways, for example, as 34539107409 + 86242656241 = 185847^2 + 293671^2 .

It is a super-2 number, since 2×120781763650² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120781763650.

It is not an unprimeable number, because it can be changed into a prime (120781763657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664057 + ... + 826156.

Almost surely, 2^120781763650 is an apocalyptic number.

120781763650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120781763650 is a deficient number, since it is larger than the sum of its proper divisors (104011057394).

120781763650 is a wasteful number, since it uses less digits than its factorization.

120781763650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491846 (or 1491841 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 120781763650 in words is "one hundred twenty billion, seven hundred eighty-one million, seven hundred sixty-three thousand, six hundred fifty".