120540726781 has 4 divisors (see below), whose sum is σ = 120542011200. Its totient is φ = 120539442364.

The previous prime is 120540726767. The next prime is 120540726793. The reversal of 120540726781 is 187627045021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120540726781 - 2¹⁵ = 120540694013 is a prime.

It is a super-2 number, since 2×120540726781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120540726701) 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, 489301 + ... + 693178.

It is an arithmetic number, because the mean of its divisors is an integer number (30135502800).

Almost surely, 2^120540726781 is an apocalyptic number.

It is an amenable number.

120540726781 is a deficient number, since it is larger than the sum of its proper divisors (1284419).

120540726781 is a wasteful number, since it uses less digits than its factorization.

120540726781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284418.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 120540726781 in words is "one hundred twenty billion, five hundred forty million, seven hundred twenty-six thousand, seven hundred eighty-one".