61764263754464 has 96 divisors (see below), whose sum is σ = 124613065463040. Its totient is φ = 30118685248512.

The previous prime is 61764263754443. The next prime is 61764263754511. The reversal of 61764263754464 is 46445736246716.

It is a self number, because there is not a number n which added to its sum of digits gives 61764263754464.

It is a congruent number.

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, 3685430117 + ... + 3685446875.

It is an arithmetic number, because the mean of its divisors is an integer number (1298052765240).

Almost surely, 2^{61764263754464} 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 61764263754464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62306532731520).

61764263754464 is an abundant number, since it is smaller than the sum of its proper divisors (62848801708576).

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

61764263754464 is a wasteful number, since it uses less digits than its factorization.

61764263754464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20672 (or 20664 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 65.

The spelling of 61764263754464 in words is "sixty-one trillion, seven hundred sixty-four billion, two hundred sixty-three million, seven hundred fifty-four thousand, four hundred sixty-four".