76920454381 has 4 divisors (see below), whose sum is σ = 76921027264. Its totient is φ = 76919881500.

The previous prime is 76920454339. The next prime is 76920454397. The reversal of 76920454381 is 18345402967.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(76920454381) divides (76920454381-1)³.

It is a cyclic number.

It is not a de Polignac number, because 76920454381 - 2¹¹ = 76920452333 is a prime.

It is a super-2 number, since 2×76920454381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76920454301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35806 + ... + 393856.

It is an arithmetic number, because the mean of its divisors is an integer number (19230256816).

It is a 2-persistent number, because it is pandigital, and so is 2⋅76920454381 = 153840908762, but 3⋅76920454381 = 230761363143 is not.

Almost surely, 2^76920454381 is an apocalyptic number.

It is an amenable number.

76920454381 is a deficient number, since it is larger than the sum of its proper divisors (572883).

76920454381 is a wasteful number, since it uses less digits than its factorization.

76920454381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572882.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 76920454381 in words is "seventy-six billion, nine hundred twenty million, four hundred fifty-four thousand, three hundred eighty-one".