1561153837140 has 36 divisors (see below), whose sum is σ = 4735499973204. Its totient is φ = 416307689856.

The previous prime is 1561153837079. The next prime is 1561153837157. The reversal of 1561153837140 is 417383511651.

1561153837140 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 1 + 538 + 3 + 71 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1234205458704 + 326948378436 = 1110948^2 + 571794^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4336538257 + ... + 4336538616.

Almost surely, 2^{1561153837140} is an apocalyptic number.

1561153837140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561153837140 is an abundant number, since it is smaller than the sum of its proper divisors (3174346136064).

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

1561153837140 is a wasteful number, since it uses less digits than its factorization.

1561153837140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673076888 (or 8673076883 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 1561153837140 in words is "one trillion, five hundred sixty-one billion, one hundred fifty-three million, eight hundred thirty-seven thousand, one hundred forty".