816464325501 has 16 divisors (see below), whose sum is σ = 1319538304320. Its totient is φ = 494826863760.

The previous prime is 816464325499. The next prime is 816464325527. The reversal of 816464325501 is 105523464618.

816464325501 is a `hidden beast` number, since 8 + 1 + 6 + 4 + 64 + 32 + 550 + 1 = 666.

It is not a de Polignac number, because 816464325501 - 2¹ = 816464325499 is a prime.

It is a super-2 number, since 2×816464325501² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816464325581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1374518770 + ... + 1374519363.

It is an arithmetic number, because the mean of its divisors is an integer number (82471144020).

Almost surely, 2^816464325501 is an apocalyptic number.

It is an amenable number.

816464325501 is a deficient number, since it is larger than the sum of its proper divisors (503073978819).

816464325501 is a wasteful number, since it uses less digits than its factorization.

816464325501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749038153 (or 2749038147 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 816464325501 in words is "eight hundred sixteen billion, four hundred sixty-four million, three hundred twenty-five thousand, five hundred one".