61551600605 has 16 divisors (see below), whose sum is σ = 80718292800. Its totient is φ = 44686104960.

The previous prime is 61551600587. The next prime is 61551600629. The reversal of 61551600605 is 50600615516.

It is not a de Polignac number, because 61551600605 - 2¹⁸ = 61551338461 is a prime.

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, 952115 + ... + 1014704.

It is an arithmetic number, because the mean of its divisors is an integer number (5044893300).

Almost surely, 2^61551600605 is an apocalyptic number.

It is an amenable number.

61551600605 is a deficient number, since it is larger than the sum of its proper divisors (19166692195).

61551600605 is a wasteful number, since it uses less digits than its factorization.

61551600605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967404.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 61551600605 in words is "sixty-one billion, five hundred fifty-one million, six hundred thousand, six hundred five".