1561261615474 has 8 divisors (see below), whose sum is σ = 2554791734448. Its totient is φ = 709664370660.

The previous prime is 1561261615471. The next prime is 1561261615517. The reversal of 1561261615474 is 4745161621651.

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

It is not an unprimeable number, because it can be changed into a prime (1561261615471) 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, 35483218512 + ... + 35483218555.

It is an arithmetic number, because the mean of its divisors is an integer number (319348966806).

Almost surely, 2^{1561261615474} is an apocalyptic number.

1561261615474 is a deficient number, since it is larger than the sum of its proper divisors (993530118974).

1561261615474 is a wasteful number, since it uses less digits than its factorization.

1561261615474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70966437080.

The product of its digits is 1209600, while the sum is 49.

The spelling of 1561261615474 in words is "one trillion, five hundred sixty-one billion, two hundred sixty-one million, six hundred fifteen thousand, four hundred seventy-four".