71249136672 has 48 divisors (see below), whose sum is σ = 213747412032. Its totient is φ = 20356896000.

The previous prime is 71249136671. The next prime is 71249136677. The reversal of 71249136672 is 27663194217.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (71249136671) 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, 53012079 + ... + 53013422.

It is an arithmetic number, because the mean of its divisors is an integer number (4453071084).

Almost surely, 2^71249136672 is an apocalyptic number.

It is an amenable number.

71249136672 is an abundant number, since it is smaller than the sum of its proper divisors (142498275360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71249136672 is a wasteful number, since it uses less digits than its factorization.

71249136672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106025521 (or 106025513 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The spelling of 71249136672 in words is "seventy-one billion, two hundred forty-nine million, one hundred thirty-six thousand, six hundred seventy-two".