61100605500551 has 4 divisors (see below), whose sum is σ = 61155306133272. Its totient is φ = 61045904867832.

The previous prime is 61100605500499. The next prime is 61100605500593. The reversal of 61100605500551 is 15500550600116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61100605500551 - 2²² = 61100601306247 is a prime.

It is a super-2 number, since 2×61100605500551² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61100605505551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27350314685 + ... + 27350316918.

It is an arithmetic number, because the mean of its divisors is an integer number (15288826533318).

Almost surely, 2^{61100605500551} is an apocalyptic number.

61100605500551 is a deficient number, since it is larger than the sum of its proper divisors (54700632721).

61100605500551 is a wasteful number, since it uses less digits than its factorization.

61100605500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54700632720.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 61100605500551 in words is "sixty-one trillion, one hundred billion, six hundred five million, five hundred thousand, five hundred fifty-one".