61662154464 has 36 divisors (see below), whose sum is σ = 175351752576. Its totient is φ = 20554051392.

The previous prime is 61662154453. The next prime is 61662154493. The reversal of 61662154464 is 46445126616.

61662154464 is a `hidden beast` number, since 6 + 16 + 621 + 5 + 4 + 4 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107052064 + ... + 107052639.

It is an arithmetic number, because the mean of its divisors is an integer number (4870882016).

Almost surely, 2^61662154464 is an apocalyptic number.

It is an amenable number.

61662154464 is an abundant number, since it is smaller than the sum of its proper divisors (113689598112).

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

61662154464 is a wasteful number, since it uses less digits than its factorization.

61662154464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214104719 (or 214104708 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 61662154464 in words is "sixty-one billion, six hundred sixty-two million, one hundred fifty-four thousand, four hundred sixty-four".