61744557654 has 96 divisors (see below), whose sum is σ = 147672461664. Its totient is φ = 18528998400.

The previous prime is 61744557649. The next prime is 61744557703. The reversal of 61744557654 is 45675544716.

61744557654 is a `hidden beast` number, since 6 + 1 + 74 + 455 + 76 + 54 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61744557654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1563982 + ... + 1602974.

It is an arithmetic number, because the mean of its divisors is an integer number (1538254809).

Almost surely, 2^61744557654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61744557654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73836230832).

61744557654 is an abundant number, since it is smaller than the sum of its proper divisors (85927904010).

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

61744557654 is a wasteful number, since it uses less digits than its factorization.

61744557654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39182 (or 39179 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 54.

The spelling of 61744557654 in words is "sixty-one billion, seven hundred forty-four million, five hundred fifty-seven thousand, six hundred fifty-four".