61137825570 has 72 divisors (see below), whose sum is σ = 165063919644. Its totient is φ = 16303402656.

The previous prime is 61137825547. The next prime is 61137825599. The reversal of 61137825570 is 7552873116.

It is a happy number.

61137825570 is a `hidden beast` number, since 6 + 1 + 1 + 3 + 78 + 2 + 5 + 570 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56363982921 + 4773842649 = 237411^2 + 69093^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 400309 + ... + 531528.

Almost surely, 2^61137825570 is an apocalyptic number.

61137825570 is an abundant number, since it is smaller than the sum of its proper divisors (103926094074).

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

61137825570 is an frugal number, since it uses more digits than its factorization.

61137825570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931868 (or 931847 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 61137825570 in words is "sixty-one billion, one hundred thirty-seven million, eight hundred twenty-five thousand, five hundred seventy".