71155625640 has 64 divisors (see below), whose sum is σ = 232872960960. Its totient is φ = 17249848320.

The previous prime is 71155625609. The next prime is 71155625657. The reversal of 71155625640 is 4652655117.

It is a junction number, because it is equal to n+sod(n) for n = 71155625592 and 71155625601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26951569 + ... + 26954208.

It is an arithmetic number, because the mean of its divisors is an integer number (3638640015).

Almost surely, 2^71155625640 is an apocalyptic number.

It is an amenable number.

71155625640 is an abundant number, since it is smaller than the sum of its proper divisors (161717335320).

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

71155625640 is a wasteful number, since it uses less digits than its factorization.

71155625640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53905802 (or 53905798 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 71155625640 in words is "seventy-one billion, one hundred fifty-five million, six hundred twenty-five thousand, six hundred forty".