61537371257272 has 64 divisors (see below), whose sum is σ = 116473904640000. Its totient is φ = 30479040283776.

The previous prime is 61537371257251. The next prime is 61537371257333. The reversal of 61537371257272 is 27275217373516.

It is a super-2 number, since 2×61537371257272² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1903574373 + ... + 1903606699.

It is an arithmetic number, because the mean of its divisors is an integer number (1819904760000).

Almost surely, 2^{61537371257272} is an apocalyptic number.

It is an amenable number.

61537371257272 is a deficient number, since it is larger than the sum of its proper divisors (54936533382728).

61537371257272 is a wasteful number, since it uses less digits than its factorization.

61537371257272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37588 (or 37584 counting only the distinct ones).

The product of its digits is 25930800, while the sum is 58.

The spelling of 61537371257272 in words is "sixty-one trillion, five hundred thirty-seven billion, three hundred seventy-one million, two hundred fifty-seven thousand, two hundred seventy-two".