161406511000 has 64 divisors (see below), whose sum is σ = 431647145280. Its totient is φ = 55339372800.

The previous prime is 161406510977. The next prime is 161406511009. The reversal of 161406511000 is 115604161.

161406511000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161406511009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11522037 + ... + 11536036.

It is an arithmetic number, because the mean of its divisors is an integer number (6744486645).

Almost surely, 2^161406511000 is an apocalyptic number.

161406511000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161406511000 is an abundant number, since it is smaller than the sum of its proper divisors (270240634280).

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

161406511000 is a wasteful number, since it uses less digits than its factorization.

161406511000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23058101 (or 23058087 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 161406511000 in words is "one hundred sixty-one billion, four hundred six million, five hundred eleven thousand".