164402415 has 24 divisors (see below), whose sum is σ = 291917808. Its totient is φ = 85541760.

The previous prime is 164402387. The next prime is 164402429. The reversal of 164402415 is 514204461.

164402415 is a `hidden beast` number, since 1 + 644 + 0 + 2 + 4 + 15 = 666.

It is not a de Polignac number, because 164402415 - 2⁸ = 164402159 is a prime.

It is a super-3 number, since 3×164402415³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42709 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (12163242).

Almost surely, 2^164402415 is an apocalyptic number.

164402415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164402415 is a deficient number, since it is larger than the sum of its proper divisors (127515393).

164402415 is a wasteful number, since it uses less digits than its factorization.

164402415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89159 (or 89156 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 164402415 is about 12821.9505146448. The cubic root of 164402415 is about 547.8177051406.

Adding to 164402415 its reverse (514204461), we get a palindrome (678606876).

The spelling of 164402415 in words is "one hundred sixty-four million, four hundred two thousand, four hundred fifteen".