823978524051 has 40 divisors (see below), whose sum is σ = 1274681876160. Its totient is φ = 530079581808.

The previous prime is 823978524029. The next prime is 823978524097. The reversal of 823978524051 is 150425879328.

823978524051 is a `hidden beast` number, since 8 + 2 + 397 + 8 + 5 + 240 + 5 + 1 = 666.

It is not a de Polignac number, because 823978524051 - 2⁷ = 823978523923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (823978524851) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1136041 + ... + 1714218.

It is an arithmetic number, because the mean of its divisors is an integer number (31867046904).

Almost surely, 2^823978524051 is an apocalyptic number.

823978524051 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

823978524051 is a deficient number, since it is larger than the sum of its proper divisors (450703352109).

823978524051 is a wasteful number, since it uses less digits than its factorization.

823978524051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850397 (or 2850388 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 823978524051 in words is "eight hundred twenty-three billion, nine hundred seventy-eight million, five hundred twenty-four thousand, fifty-one".