1061211372557 has 8 divisors (see below), whose sum is σ = 1215550727616. Its totient is φ = 907556450112.

The previous prime is 1061211372541. The next prime is 1061211372563. The reversal of 1061211372557 is 7552731121601.

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 1061211372557 - 2⁴ = 1061211372541 is a prime.

It is a super-2 number, since 2×1061211372557² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061211372577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171104828 + ... + 171111029.

It is an arithmetic number, because the mean of its divisors is an integer number (151943840952).

Almost surely, 2^{1061211372557} is an apocalyptic number.

It is an amenable number.

1061211372557 is a deficient number, since it is larger than the sum of its proper divisors (154339355059).

1061211372557 is an equidigital number, since it uses as much as digits as its factorization.

1061211372557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342216307.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 1061211372557 in words is "one trillion, sixty-one billion, two hundred eleven million, three hundred seventy-two thousand, five hundred fifty-seven".