1561000497 has 12 divisors (see below), whose sum is σ = 2421143856. Its totient is φ = 892000200.

The previous prime is 1561000439. The next prime is 1561000531. The reversal of 1561000497 is 7940001651.

1561000497 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1561000497 - 2⁶ = 1561000433 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1561000417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5309379 + ... + 5309672.

It is an arithmetic number, because the mean of its divisors is an integer number (201761988).

Almost surely, 2^1561000497 is an apocalyptic number.

It is an amenable number.

1561000497 is a deficient number, since it is larger than the sum of its proper divisors (860143359).

1561000497 is a wasteful number, since it uses less digits than its factorization.

1561000497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10619068 (or 10619061 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1561000497 is about 39509.4988199041. The cubic root of 1561000497 is about 1160.0258855203.

The spelling of 1561000497 in words is "one billion, five hundred sixty-one million, four hundred ninety-seven", and thus it is an aban number.