71745631377 has 8 divisors (see below), whose sum is σ = 109326676416. Its totient is φ = 40997503632.

The previous prime is 71745631367. The next prime is 71745631481. The reversal of 71745631377 is 77313654717.

It is a happy number.

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

It is not a de Polignac number, because 71745631377 - 2⁷ = 71745631249 is a prime.

It is a super-2 number, since 2×71745631377² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71745631367) 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, 1708229298 + ... + 1708229339.

It is an arithmetic number, because the mean of its divisors is an integer number (13665834552).

Almost surely, 2^71745631377 is an apocalyptic number.

It is an amenable number.

71745631377 is a deficient number, since it is larger than the sum of its proper divisors (37581045039).

71745631377 is a wasteful number, since it uses less digits than its factorization.

71745631377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416458647.

The product of its digits is 2593080, while the sum is 51.

The spelling of 71745631377 in words is "seventy-one billion, seven hundred forty-five million, six hundred thirty-one thousand, three hundred seventy-seven".