164015655520 has 24 divisors (see below), whose sum is σ = 387486986544. Its totient is φ = 65606262144.

The previous prime is 164015655509. The next prime is 164015655523. The reversal of 164015655520 is 25556510461.

It is a super-2 number, since 2×164015655520² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164015655523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512548764 + ... + 512549083.

It is an arithmetic number, because the mean of its divisors is an integer number (16145291106).

Almost surely, 2^164015655520 is an apocalyptic number.

164015655520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164015655520 is an abundant number, since it is smaller than the sum of its proper divisors (223471331024).

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

164015655520 is a wasteful number, since it uses less digits than its factorization.

164015655520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025097862 (or 1025097854 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 164015655520 in words is "one hundred sixty-four billion, fifteen million, six hundred fifty-five thousand, five hundred twenty".