121765754745 has 24 divisors (see below), whose sum is σ = 211079935872. Its totient is φ = 64935799200.

The previous prime is 121765754731. The next prime is 121765754749. The reversal of 121765754745 is 547457567121.

121765754745 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 6 + 57 + 547 + 45 = 666.

It is not a de Polignac number, because 121765754745 - 2⁴ = 121765754729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121765754691 and 121765754700.

It is not an unprimeable number, because it can be changed into a prime (121765754749) 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, 398250 + ... + 634140.

It is an arithmetic number, because the mean of its divisors is an integer number (8794997328).

Almost surely, 2^121765754745 is an apocalyptic number.

121765754745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121765754745 is a deficient number, since it is larger than the sum of its proper divisors (89314181127).

121765754745 is a wasteful number, since it uses less digits than its factorization.

121765754745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247373 (or 247370 counting only the distinct ones).

The product of its digits is 8232000, while the sum is 54.

The spelling of 121765754745 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred fifty-four thousand, seven hundred forty-five".