120781043720 has 16 divisors (see below), whose sum is σ = 271757348460. Its totient is φ = 48312417472.

The previous prime is 120781043689. The next prime is 120781043729. The reversal of 120781043720 is 27340187021.

It can be written as a sum of positive squares in 2 ways, for example, as 115917097156 + 4863946564 = 340466^2 + 69742^2 .

It is not an unprimeable number, because it can be changed into a prime (120781043729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509763007 + ... + 1509763086.

Almost surely, 2^120781043720 is an apocalyptic number.

120781043720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120781043720 is an abundant number, since it is smaller than the sum of its proper divisors (150976304740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120781043720 is a wasteful number, since it uses less digits than its factorization.

120781043720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019526104 (or 3019526100 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 120781043720 in words is "one hundred twenty billion, seven hundred eighty-one million, forty-three thousand, seven hundred twenty".