61555256148 has 48 divisors (see below), whose sum is σ = 144436690944. Its totient is φ = 20403108960.

The previous prime is 61555256141. The next prime is 61555256159. The reversal of 61555256148 is 84165255516.

It is a junction number, because it is equal to n+sod(n) for n = 61555256097 and 61555256106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61555256141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11381661 + ... + 11387067.

It is an arithmetic number, because the mean of its divisors is an integer number (3009097728).

Almost surely, 2^61555256148 is an apocalyptic number.

It is an amenable number.

61555256148 is an abundant number, since it is smaller than the sum of its proper divisors (82881434796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61555256148 is a wasteful number, since it uses less digits than its factorization.

61555256148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572 (or 10570 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 48.

The spelling of 61555256148 in words is "sixty-one billion, five hundred fifty-five million, two hundred fifty-six thousand, one hundred forty-eight".