61106501500551 has 48 divisors (see below), whose sum is σ = 95743809950880. Its totient is φ = 37331360352000.

The previous prime is 61106501500547. The next prime is 61106501500691. The reversal of 61106501500551 is 15500510560116.

It is a happy number.

61106501500551 is a `hidden beast` number, since 6 + 1 + 1 + 0 + 6 + 50 + 1 + 50 + 0 + 551 = 666.

It is not a de Polignac number, because 61106501500551 - 2² = 61106501500547 is a prime.

It is a super-2 number, since 2×61106501500551² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61106501500501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317048425 + ... + 317241101.

It is an arithmetic number, because the mean of its divisors is an integer number (1994662707310).

Almost surely, 2^{61106501500551} is an apocalyptic number.

61106501500551 is a deficient number, since it is larger than the sum of its proper divisors (34637308450329).

61106501500551 is a wasteful number, since it uses less digits than its factorization.

61106501500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212336 (or 212333 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 61106501500551 in words is "sixty-one trillion, one hundred six billion, five hundred one million, five hundred thousand, five hundred fifty-one".