71772381755 has 8 divisors (see below), whose sum is σ = 86142127632. Its totient is φ = 57407725728.

The previous prime is 71772381743. The next prime is 71772381757. The reversal of 71772381755 is 55718327717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71772381755 - 2⁶ = 71772381691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71772381697 and 71772381706.

It is not an unprimeable number, because it can be changed into a prime (71772381757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241369 + ... + 1297898.

It is an arithmetic number, because the mean of its divisors is an integer number (10767765954).

Almost surely, 2^71772381755 is an apocalyptic number.

71772381755 is a deficient number, since it is larger than the sum of its proper divisors (14369745877).

71772381755 is a wasteful number, since it uses less digits than its factorization.

71772381755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544925.

The product of its digits is 2881200, while the sum is 53.

The spelling of 71772381755 in words is "seventy-one billion, seven hundred seventy-two million, three hundred eighty-one thousand, seven hundred fifty-five".