61143393111 has 32 divisors (see below), whose sum is σ = 88462015488. Its totient is φ = 37413288960.

The previous prime is 61143393109. The next prime is 61143393133. The reversal of 61143393111 is 11139334116.

It is not a de Polignac number, because 61143393111 - 2¹ = 61143393109 is a prime.

It is a super-2 number, since 2×61143393111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61143393161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6985840 + ... + 6994586.

It is an arithmetic number, because the mean of its divisors is an integer number (2764437984).

Almost surely, 2^61143393111 is an apocalyptic number.

61143393111 is a deficient number, since it is larger than the sum of its proper divisors (27318622377).

61143393111 is a wasteful number, since it uses less digits than its factorization.

61143393111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12151.

The product of its digits is 5832, while the sum is 33.

The spelling of 61143393111 in words is "sixty-one billion, one hundred forty-three million, three hundred ninety-three thousand, one hundred eleven".