54920061561 has 8 divisors (see below), whose sum is σ = 73228327200. Its totient is φ = 36612585152.

The previous prime is 54920061557. The next prime is 54920061563. The reversal of 54920061561 is 16516002945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54920061561 - 2² = 54920061557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54920061563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9360 + ... + 331553.

It is an arithmetic number, because the mean of its divisors is an integer number (9153540900).

Almost surely, 2^54920061561 is an apocalyptic number.

It is an amenable number.

54920061561 is a deficient number, since it is larger than the sum of its proper divisors (18308265639).

54920061561 is a wasteful number, since it uses less digits than its factorization.

54920061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394615.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 54920061561 in words is "fifty-four billion, nine hundred twenty million, sixty-one thousand, five hundred sixty-one".