61026757255645 has 8 divisors (see below), whose sum is σ = 73233443513304. Its totient is φ = 48820515933504.

The previous prime is 61026757255589. The next prime is 61026757255817. The reversal of 61026757255645 is 54655275762016.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41570797841764 + 19455959413881 = 6447542^2 + 4410891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61026757255645 - 2¹¹ = 61026757253597 is a prime.

It is a super-2 number, since 2×61026757255645² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110932054 + ... + 111480823.

It is an arithmetic number, because the mean of its divisors is an integer number (9154180439163).

Almost surely, 2^{61026757255645} is an apocalyptic number.

It is an amenable number.

61026757255645 is a deficient number, since it is larger than the sum of its proper divisors (12206686257659).

61026757255645 is a wasteful number, since it uses less digits than its factorization.

61026757255645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222467759.

The product of its (nonzero) digits is 105840000, while the sum is 61.

The spelling of 61026757255645 in words is "sixty-one trillion, twenty-six billion, seven hundred fifty-seven million, two hundred fifty-five thousand, six hundred forty-five".