161421652554000 has 80 divisors (see below), whose sum is σ = 520423407853440. Its totient is φ = 43045774012800.

The previous prime is 161421652553977. The next prime is 161421652554119. The reversal of 161421652554000 is 455256124161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 13451798380 + ... + 13451810379.

It is an arithmetic number, because the mean of its divisors is an integer number (6505292598168).

Almost surely, 2^{161421652554000} is an apocalyptic number.

161421652554000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161421652554000 is an abundant number, since it is smaller than the sum of its proper divisors (359001755299440).

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

161421652554000 is a wasteful number, since it uses less digits than its factorization.

161421652554000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26903608785 (or 26903608769 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 161421652554000 in words is "one hundred sixty-one trillion, four hundred twenty-one billion, six hundred fifty-two million, five hundred fifty-four thousand".