61255551005 has 16 divisors (see below), whose sum is σ = 80203604544. Its totient is φ = 44541425280.

The previous prime is 61255550957. The next prime is 61255551013. The reversal of 61255551005 is 50015555216.

It is a happy number.

It is not a de Polignac number, because 61255551005 - 2¹² = 61255546909 is a prime.

It is a Duffinian number.

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, 214577 + ... + 410553.

It is an arithmetic number, because the mean of its divisors is an integer number (5012725284).

Almost surely, 2^61255551005 is an apocalyptic number.

It is an amenable number.

61255551005 is a deficient number, since it is larger than the sum of its proper divisors (18948053539).

61255551005 is a wasteful number, since it uses less digits than its factorization.

61255551005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201676.

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 61255551005 in words is "sixty-one billion, two hundred fifty-five million, five hundred fifty-one thousand, five".