1000001557061 has 16 divisors (see below), whose sum is σ = 1085826163968. Its totient is φ = 915476385600.

The previous prime is 1000001557021. The next prime is 1000001557097. The reversal of 1000001557061 is 1607551000001.

1000001557061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000001557061 is a prime.

It is a super-2 number, since 2×1000001557061² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000001557061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000001557021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284546 + ... + 1442556.

It is an arithmetic number, because the mean of its divisors is an integer number (67864135248).

Almost surely, 2^{1000001557061} is an apocalyptic number.

It is an amenable number.

1000001557061 is a deficient number, since it is larger than the sum of its proper divisors (85824606907).

1000001557061 is a wasteful number, since it uses less digits than its factorization.

1000001557061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158572.

The product of its (nonzero) digits is 1050, while the sum is 26.

Adding to 1000001557061 its reverse (1607551000001), we get a palindrome (2607552557062).

The spelling of 1000001557061 in words is "one trillion, one million, five hundred fifty-seven thousand, sixty-one".