3121615346461 has 4 divisors (see below), whose sum is σ = 3121746978400. Its totient is φ = 3121483714524.

The previous prime is 3121615346449. The next prime is 3121615346467. The reversal of 3121615346461 is 1646435161213.

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 3121615346461 - 2¹¹ = 3121615344413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121615346467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65780391 + ... + 65827828.

It is an arithmetic number, because the mean of its divisors is an integer number (780436744600).

Almost surely, 2^{3121615346461} is an apocalyptic number.

It is an amenable number.

3121615346461 is a deficient number, since it is larger than the sum of its proper divisors (131631939).

3121615346461 is a wasteful number, since it uses less digits than its factorization.

3121615346461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131631938.

The product of its digits is 311040, while the sum is 43.

The spelling of 3121615346461 in words is "three trillion, one hundred twenty-one billion, six hundred fifteen million, three hundred forty-six thousand, four hundred sixty-one".