1561131034649 has 8 divisors (see below), whose sum is σ = 1570193672832. Its totient is φ = 1552068842320.

The previous prime is 1561131034609. The next prime is 1561131034651. The reversal of 1561131034649 is 9464301311651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1561131034649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561131034609) 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, 9124202 + ... + 9293724.

It is an arithmetic number, because the mean of its divisors is an integer number (196274209104).

Almost surely, 2^{1561131034649} is an apocalyptic number.

It is an amenable number.

1561131034649 is a deficient number, since it is larger than the sum of its proper divisors (9062638183).

1561131034649 is a wasteful number, since it uses less digits than its factorization.

1561131034649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222927.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 1561131034649 in words is "one trillion, five hundred sixty-one billion, one hundred thirty-one million, thirty-four thousand, six hundred forty-nine".