61171391262 has 16 divisors (see below), whose sum is σ = 123816792960. Its totient is φ = 20144795352.

The previous prime is 61171391249. The next prime is 61171391263. The reversal of 61171391262 is 26219317116.

It is a self number, because there is not a number n which added to its sum of digits gives 61171391262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61171391263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61416562 + ... + 61417557.

It is an arithmetic number, because the mean of its divisors is an integer number (7738549560).

Almost surely, 2^61171391262 is an apocalyptic number.

61171391262 is an abundant number, since it is smaller than the sum of its proper divisors (62645401698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61171391262 is a wasteful number, since it uses less digits than its factorization.

61171391262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122834207.

The product of its digits is 27216, while the sum is 39.

The spelling of 61171391262 in words is "sixty-one billion, one hundred seventy-one million, three hundred ninety-one thousand, two hundred sixty-two".