1561269019040 has 48 divisors (see below), whose sum is σ = 3707033299200. Its totient is φ = 621369365760.

The previous prime is 1561269019039. The next prime is 1561269019069. The reversal of 1561269019040 is 409109621651.

It is a junction number, because it is equal to n+sod(n) for n = 1561269018982 and 1561269019000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24485576 + ... + 24549255.

It is an arithmetic number, because the mean of its divisors is an integer number (77229860400).

Almost surely, 2^{1561269019040} is an apocalyptic number.

1561269019040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561269019040 is an abundant number, since it is smaller than the sum of its proper divisors (2145764280160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561269019040 is a wasteful number, since it uses less digits than its factorization.

1561269019040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49035045 (or 49035037 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 1561269019040 in words is "one trillion, five hundred sixty-one billion, two hundred sixty-nine million, nineteen thousand, forty".