121463625665 has 8 divisors (see below), whose sum is σ = 150782432040. Its totient is φ = 93820179712.

The previous prime is 121463625653. The next prime is 121463625677. The reversal of 121463625665 is 566526364121.

It is an interprime number because it is at equal distance from previous prime (121463625653) and next prime (121463625677).

It can be written as a sum of positive squares in 4 ways, for example, as 7343975809 + 114119649856 = 85697^2 + 337816^2 .

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 121463625665 - 2¹² = 121463621569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418839944 + ... + 418840233.

It is an arithmetic number, because the mean of its divisors is an integer number (18847804005).

Almost surely, 2^121463625665 is an apocalyptic number.

It is an amenable number.

121463625665 is a deficient number, since it is larger than the sum of its proper divisors (29318806375).

121463625665 is an equidigital number, since it uses as much as digits as its factorization.

121463625665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837680211.

The product of its digits is 1555200, while the sum is 47.

Adding to 121463625665 its reverse (566526364121), we get a palindrome (687989989786).

The spelling of 121463625665 in words is "one hundred twenty-one billion, four hundred sixty-three million, six hundred twenty-five thousand, six hundred sixty-five".