71655740412601 has 4 divisors (see below), whose sum is σ = 73592382045412. Its totient is φ = 69719098779792.

The previous prime is 71655740412563. The next prime is 71655740412631. The reversal of 71655740412601 is 10621404755617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59589676719225 + 12066063693376 = 7719435^2 + 3473624^2 .

It is a cyclic number.

It is not a de Polignac number, because 71655740412601 - 2¹⁷ = 71655740281529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71655740412631) 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, 968320816350 + ... + 968320816423.

It is an arithmetic number, because the mean of its divisors is an integer number (18398095511353).

Almost surely, 2^{71655740412601} is an apocalyptic number.

It is an amenable number.

71655740412601 is a deficient number, since it is larger than the sum of its proper divisors (1936641632811).

71655740412601 is a wasteful number, since it uses less digits than its factorization.

71655740412601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936641632810.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 71655740412601 in words is "seventy-one trillion, six hundred fifty-five billion, seven hundred forty million, four hundred twelve thousand, six hundred one".