165656516420450 has 96 divisors (see below), whose sum is σ = 343335194926848. Its totient is φ = 58948244864000.

The previous prime is 165656516420383. The next prime is 165656516420531. The reversal of 165656516420450 is 54024615656561.

165656516420450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173675840 + ... + 174627060.

It is an arithmetic number, because the mean of its divisors is an integer number (3576408280488).

Almost surely, 2^{165656516420450} is an apocalyptic number.

165656516420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165656516420450 is an abundant number, since it is smaller than the sum of its proper divisors (177678678506398).

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

165656516420450 is a wasteful number, since it uses less digits than its factorization.

165656516420450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958028 (or 958023 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 56.

The spelling of 165656516420450 in words is "one hundred sixty-five trillion, six hundred fifty-six billion, five hundred sixteen million, four hundred twenty thousand, four hundred fifty".