1161557361240 has 128 divisors (see below), whose sum is σ = 3668401440000. Its totient is φ = 293420026368.

The previous prime is 1161557361191. The next prime is 1161557361257. The reversal of 1161557361240 is 421637551611.

It is a junction number, because it is equal to n+sod(n) for n = 1161557361192 and 1161557361201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48590811 + ... + 48614709.

It is an arithmetic number, because the mean of its divisors is an integer number (28659386250).

Almost surely, 2^{1161557361240} is an apocalyptic number.

1161557361240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161557361240 is an abundant number, since it is smaller than the sum of its proper divisors (2506844078760).

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

1161557361240 is a wasteful number, since it uses less digits than its factorization.

1161557361240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45249 (or 45245 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 1161557361240 in words is "one trillion, one hundred sixty-one billion, five hundred fifty-seven million, three hundred sixty-one thousand, two hundred forty".