71987338741 has 8 divisors (see below), whose sum is σ = 72095870880. Its totient is φ = 71878847952.

The previous prime is 71987338733. The next prime is 71987338781. The reversal of 71987338741 is 14783378917.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71987338741 - 2³ = 71987338733 is a prime.

It is a super-2 number, since 2×71987338741² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71987338721) 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, 5809090 + ... + 5821468.

It is an arithmetic number, because the mean of its divisors is an integer number (9011983860).

Almost surely, 2^71987338741 is an apocalyptic number.

It is an amenable number.

71987338741 is a deficient number, since it is larger than the sum of its proper divisors (108532139).

71987338741 is a wasteful number, since it uses less digits than its factorization.

71987338741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20675.

The product of its digits is 7112448, while the sum is 58.

The spelling of 71987338741 in words is "seventy-one billion, nine hundred eighty-seven million, three hundred thirty-eight thousand, seven hundred forty-one".