71155311940 has 24 divisors (see below), whose sum is σ = 149627298240. Its totient is φ = 28423811808.

The previous prime is 71155311917. The next prime is 71155311967. The reversal of 71155311940 is 4911355117.

It is a self number, because there is not a number n which added to its sum of digits gives 71155311940.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379330 + ... + 2409049.

It is an arithmetic number, because the mean of its divisors is an integer number (6234470760).

Almost surely, 2^71155311940 is an apocalyptic number.

It is an amenable number.

71155311940 is an abundant number, since it is smaller than the sum of its proper divisors (78471986300).

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

71155311940 is a wasteful number, since it uses less digits than its factorization.

71155311940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789131 (or 4789129 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 71155311940 in words is "seventy-one billion, one hundred fifty-five million, three hundred eleven thousand, nine hundred forty".