2161508346040 has 32 divisors (see below), whose sum is σ = 5119361874000. Its totient is φ = 819097899264.

The previous prime is 2161508346013. The next prime is 2161508346077. The reversal of 2161508346040 is 406438051612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2161508345984 and 2161508346002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1422044205 + ... + 1422045724.

Almost surely, 2^{2161508346040} is an apocalyptic number.

2161508346040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161508346040 is an abundant number, since it is smaller than the sum of its proper divisors (2957853527960).

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

2161508346040 is a wasteful number, since it uses less digits than its factorization.

2161508346040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844089959 (or 2844089955 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 2161508346040 in words is "two trillion, one hundred sixty-one billion, five hundred eight million, three hundred forty-six thousand, forty".