65634770136 has 128 divisors (see below), whose sum is σ = 177630405120. Its totient is φ = 20090363904.

The previous prime is 65634770107. The next prime is 65634770141. The reversal of 65634770136 is 63107743656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79750221 + ... + 79751043.

It is an arithmetic number, because the mean of its divisors is an integer number (1387737540).

Almost surely, 2^65634770136 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 65634770136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88815202560).

65634770136 is an abundant number, since it is smaller than the sum of its proper divisors (111995634984).

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

65634770136 is a wasteful number, since it uses less digits than its factorization.

65634770136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1861 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 65634770136 in words is "sixty-five billion, six hundred thirty-four million, seven hundred seventy thousand, one hundred thirty-six".