71477804121 has 64 divisors (see below), whose sum is σ = 104189690880. Its totient is φ = 43415285760.

The previous prime is 71477804117. The next prime is 71477804137. The reversal of 71477804121 is 12140877417.

It is not a de Polignac number, because 71477804121 - 2² = 71477804117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71477804161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108135531 + ... + 108136191.

It is an arithmetic number, because the mean of its divisors is an integer number (1627963920).

Almost surely, 2^71477804121 is an apocalyptic number.

It is an amenable number.

71477804121 is a deficient number, since it is larger than the sum of its proper divisors (32711886759).

71477804121 is a wasteful number, since it uses less digits than its factorization.

71477804121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 87808, while the sum is 42.

The spelling of 71477804121 in words is "seventy-one billion, four hundred seventy-seven million, eight hundred four thousand, one hundred twenty-one".