121761542647 has 8 divisors (see below), whose sum is σ = 122326428672. Its totient is φ = 121196907000.

The previous prime is 121761542633. The next prime is 121761542653. The reversal of 121761542647 is 746245167121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121761542647 - 2¹¹ = 121761540599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121761542597 and 121761542606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121761542347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950122 + ... + 1070632.

It is an arithmetic number, because the mean of its divisors is an integer number (15290803584).

Almost surely, 2^121761542647 is an apocalyptic number.

121761542647 is a deficient number, since it is larger than the sum of its proper divisors (564886025).

121761542647 is a wasteful number, since it uses less digits than its factorization.

121761542647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125189.

The product of its digits is 564480, while the sum is 46.

The spelling of 121761542647 in words is "one hundred twenty-one billion, seven hundred sixty-one million, five hundred forty-two thousand, six hundred forty-seven".