61505276055 has 64 divisors (see below), whose sum is σ = 104954548608. Its totient is φ = 30649466880.

The previous prime is 61505276033. The next prime is 61505276057. The reversal of 61505276055 is 55067250516.

It is a happy number.

It is not a de Polignac number, because 61505276055 - 2¹⁵ = 61505243287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61505275998 and 61505276016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61505276057) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51554539 + ... + 51555731.

It is an arithmetic number, because the mean of its divisors is an integer number (1639914822).

Almost surely, 2^61505276055 is an apocalyptic number.

61505276055 is a deficient number, since it is larger than the sum of its proper divisors (43449272553).

61505276055 is a wasteful number, since it uses less digits than its factorization.

61505276055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516.

The product of its (nonzero) digits is 315000, while the sum is 42.

The spelling of 61505276055 in words is "sixty-one billion, five hundred five million, two hundred seventy-six thousand, fifty-five".