61554405073 has 16 divisors (see below), whose sum is σ = 72429565824. Its totient is φ = 51212730240.

The previous prime is 61554405047. The next prime is 61554405079. The reversal of 61554405073 is 37050445516.

It is a de Polignac number, because none of the positive numbers 2^k-61554405073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61554405079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487815 + ... + 600892.

It is an arithmetic number, because the mean of its divisors is an integer number (4526847864).

Almost surely, 2^61554405073 is an apocalyptic number.

It is an amenable number.

61554405073 is a deficient number, since it is larger than the sum of its proper divisors (10875160751).

61554405073 is a wasteful number, since it uses less digits than its factorization.

61554405073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088952.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 61554405073 in words is "sixty-one billion, five hundred fifty-four million, four hundred five thousand, seventy-three".