65274544400 has 120 divisors (see below), whose sum is σ = 168997308480. Its totient is φ = 24085393920.

The previous prime is 65274544399. The next prime is 65274544427. The reversal of 65274544400 is 444547256.

It is a happy number.

It is a super-2 number, since 2×65274544400² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10287629 + ... + 10293971.

It is an arithmetic number, because the mean of its divisors is an integer number (1408310904).

Almost surely, 2^65274544400 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 65274544400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84498654240).

65274544400 is an abundant number, since it is smaller than the sum of its proper divisors (103722764080).

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

65274544400 is a wasteful number, since it uses less digits than its factorization.

65274544400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353 (or 8342 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 41.

The spelling of 65274544400 in words is "sixty-five billion, two hundred seventy-four million, five hundred forty-four thousand, four hundred".