61253372128 has 96 divisors (see below), whose sum is σ = 133514873856. Its totient is φ = 27478683648.

The previous prime is 61253372077. The next prime is 61253372143. The reversal of 61253372128 is 82127335216.

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, 25595700 + ... + 25598092.

It is an arithmetic number, because the mean of its divisors is an integer number (1390779936).

Almost surely, 2^61253372128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61253372128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66757436928).

61253372128 is an abundant number, since it is smaller than the sum of its proper divisors (72261501728).

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

61253372128 is a wasteful number, since it uses less digits than its factorization.

61253372128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4108 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The spelling of 61253372128 in words is "sixty-one billion, two hundred fifty-three million, three hundred seventy-two thousand, one hundred twenty-eight".