165211356540 has 48 divisors (see below), whose sum is σ = 463162331520. Its totient is φ = 44002025280.

The previous prime is 165211356533. The next prime is 165211356587. The reversal of 165211356540 is 45653112561.

165211356540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1648950 + ... + 1746269.

It is an arithmetic number, because the mean of its divisors is an integer number (9649215240).

Almost surely, 2^165211356540 is an apocalyptic number.

165211356540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165211356540 is an abundant number, since it is smaller than the sum of its proper divisors (297950974980).

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

165211356540 is a wasteful number, since it uses less digits than its factorization.

165211356540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396042 (or 3396040 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 165211356540 in words is "one hundred sixty-five billion, two hundred eleven million, three hundred fifty-six thousand, five hundred forty".