64820156 has 6 divisors (see below), whose sum is σ = 113435280. Its totient is φ = 32410076.

The previous prime is 64820143. The next prime is 64820177. The reversal of 64820156 is 65102846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102516 + ... + 8102523.

It is an arithmetic number, because the mean of its divisors is an integer number (18905880).

Almost surely, 2^64820156 is an apocalyptic number.

It is an amenable number.

64820156 is a deficient number, since it is larger than the sum of its proper divisors (48615124).

64820156 is a wasteful number, since it uses less digits than its factorization.

64820156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16205043 (or 16205041 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 64820156 is about 8051.0965712752. The cubic root of 64820156 is about 401.7014110733.

The spelling of 64820156 in words is "sixty-four million, eight hundred twenty thousand, one hundred fifty-six".