71738155 has 4 divisors (see below), whose sum is σ = 86085792. Its totient is φ = 57390520.

The previous prime is 71738131. The next prime is 71738171. The reversal of 71738155 is 55183717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55183717 = 17 ⋅3246101.

It is not a de Polignac number, because 71738155 - 2²¹ = 69641003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7173811 + ... + 7173820.

It is an arithmetic number, because the mean of its divisors is an integer number (21521448).

Almost surely, 2^71738155 is an apocalyptic number.

71738155 is a deficient number, since it is larger than the sum of its proper divisors (14347637).

71738155 is a wasteful number, since it uses less digits than its factorization.

71738155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14347636.

The product of its digits is 29400, while the sum is 37.

The square root of 71738155 is about 8469.8379559470. The cubic root of 71738155 is about 415.5118376225.

The spelling of 71738155 in words is "seventy-one million, seven hundred thirty-eight thousand, one hundred fifty-five".