121762041649 has 4 divisors (see below), whose sum is σ = 121763622400. Its totient is φ = 121760460900.

The previous prime is 121762041619. The next prime is 121762041703. The reversal of 121762041649 is 946140267121.

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 a de Polignac number, because none of the positive numbers 2^k-121762041649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121762041619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668577 + ... + 830974.

It is an arithmetic number, because the mean of its divisors is an integer number (30440905600).

Almost surely, 2^121762041649 is an apocalyptic number.

It is an amenable number.

121762041649 is a deficient number, since it is larger than the sum of its proper divisors (1580751).

121762041649 is an equidigital number, since it uses as much as digits as its factorization.

121762041649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580750.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 121762041649 in words is "one hundred twenty-one billion, seven hundred sixty-two million, forty-one thousand, six hundred forty-nine".