61252542663420 has 192 divisors, whose sum is σ = 175299120815616. Its totient is φ = 15974857866240.

The previous prime is 61252542663383. The next prime is 61252542663421. The reversal of 61252542663420 is 2436624525216.

It is a self number, because there is not a number n which added to its sum of digits gives 61252542663420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61252542663421) 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, 5116738035 + ... + 5116750005.

It is an arithmetic number, because the mean of its divisors is an integer number (913016254248).

Almost surely, 2^{61252542663420} is an apocalyptic number.

61252542663420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61252542663420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87649560407808).

61252542663420 is an abundant number, since it is smaller than the sum of its proper divisors (114046578152196).

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

61252542663420 is a wasteful number, since it uses less digits than its factorization.

61252542663420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17020 (or 17018 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 61252542663420 in words is "sixty-one trillion, two hundred fifty-two billion, five hundred forty-two million, six hundred sixty-three thousand, four hundred twenty".