61188362500 has 36 divisors (see below), whose sum is σ = 133841003940. Its totient is φ = 24475340000.

The previous prime is 61188362377. The next prime is 61188362509. The reversal of 61188362500 is 526388116.

It can be written as a sum of positive squares in 6 ways, for example, as 57361208004 + 3827154496 = 239502^2 + 61864^2 .

It is not an unprimeable number, because it can be changed into a prime (61188362509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2435035 + ... + 2460034.

It is an arithmetic number, because the mean of its divisors is an integer number (3717805665).

Almost surely, 2^61188362500 is an apocalyptic number.

It is an amenable number.

61188362500 is an abundant number, since it is smaller than the sum of its proper divisors (72652641440).

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

61188362500 is an equidigital number, since it uses as much as digits as its factorization.

61188362500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895098 (or 4895076 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 61188362500 in words is "sixty-one billion, one hundred eighty-eight million, three hundred sixty-two thousand, five hundred".