1561142002305 has 16 divisors (see below), whose sum is σ = 2506653455040. Its totient is φ = 829666984128.

The previous prime is 1561142002291. The next prime is 1561142002337. The reversal of 1561142002305 is 5032002411651.

It is not a de Polignac number, because 1561142002305 - 2¹⁶ = 1561141936769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183875850 + ... + 183884339.

It is an arithmetic number, because the mean of its divisors is an integer number (156665840940).

Almost surely, 2^{1561142002305} is an apocalyptic number.

1561142002305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1561142002305 is a deficient number, since it is larger than the sum of its proper divisors (945511452735).

1561142002305 is a wasteful number, since it uses less digits than its factorization.

1561142002305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367760480.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1561142002305 its reverse (5032002411651), we get a palindrome (6593144413956).

The spelling of 1561142002305 in words is "one trillion, five hundred sixty-one billion, one hundred forty-two million, two thousand, three hundred five".