53971056636 has 96 divisors (see below), whose sum is σ = 147381577728. Its totient is φ = 15050266560.

The previous prime is 53971056631. The next prime is 53971056641. The reversal of 53971056636 is 63665017935.

It is an interprime number because it is at equal distance from previous prime (53971056631) and next prime (53971056641).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53971056631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5496171 + ... + 5505981.

It is an arithmetic number, because the mean of its divisors is an integer number (1535224768).

Almost surely, 2^53971056636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53971056636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73690788864).

53971056636 is an abundant number, since it is smaller than the sum of its proper divisors (93410521092).

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

53971056636 is a wasteful number, since it uses less digits than its factorization.

53971056636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11391 (or 11389 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 51.

The spelling of 53971056636 in words is "fifty-three billion, nine hundred seventy-one million, fifty-six thousand, six hundred thirty-six".