81762553494 has 32 divisors (see below), whose sum is σ = 181743996000. Its totient is φ = 27246769632.

The previous prime is 81762553489. The next prime is 81762553501. The reversal of 81762553494 is 49435526718.

It is a happy number.

81762553494 is a `hidden beast` number, since 8 + 1 + 7 + 625 + 5 + 3 + 4 + 9 + 4 = 666.

It is a super-3 number, since 3×81762553494³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81762553494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829 + ... + 404400.

It is an arithmetic number, because the mean of its divisors is an integer number (5679499875).

Almost surely, 2^81762553494 is an apocalyptic number.

81762553494 is an abundant number, since it is smaller than the sum of its proper divisors (99981442506).

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

81762553494 is a wasteful number, since it uses less digits than its factorization.

81762553494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411949 (or 411943 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 81762553494 in words is "eighty-one billion, seven hundred sixty-two million, five hundred fifty-three thousand, four hundred ninety-four".