1371165661461 has 4 divisors (see below), whose sum is σ = 1828220881952. Its totient is φ = 914110440972.

The previous prime is 1371165661447. The next prime is 1371165661517. The reversal of 1371165661461 is 1641665611731.

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 not a de Polignac number, because 1371165661461 - 2¹⁴ = 1371165645077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1371165661461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371165261461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228527610241 + ... + 228527610246.

It is an arithmetic number, because the mean of its divisors is an integer number (457055220488).

Almost surely, 2^{1371165661461} is an apocalyptic number.

It is an amenable number.

1371165661461 is a deficient number, since it is larger than the sum of its proper divisors (457055220491).

1371165661461 is an equidigital number, since it uses as much as digits as its factorization.

1371165661461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457055220490.

The product of its digits is 544320, while the sum is 48.

The spelling of 1371165661461 in words is "one trillion, three hundred seventy-one billion, one hundred sixty-five million, six hundred sixty-one thousand, four hundred sixty-one".