61177256020 has 48 divisors (see below), whose sum is σ = 135989582400. Its totient is φ = 23053420800.

The previous prime is 61177255999. The next prime is 61177256029. The reversal of 61177256020 is 2065277116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61177256029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381681 + ... + 517720.

It is an arithmetic number, because the mean of its divisors is an integer number (2833116300).

Almost surely, 2^61177256020 is an apocalyptic number.

It is an amenable number.

61177256020 is an abundant number, since it is smaller than the sum of its proper divisors (74812326380).

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

61177256020 is a wasteful number, since it uses less digits than its factorization.

61177256020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899608 (or 899606 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 61177256020 in words is "sixty-one billion, one hundred seventy-seven million, two hundred fifty-six thousand, twenty".