61126263919 has 16 divisors (see below), whose sum is σ = 72443258368. Its totient is φ = 50482935072.

The previous prime is 61126263851. The next prime is 61126263931. The reversal of 61126263919 is 91936262116.

It is a cyclic number.

It is not a de Polignac number, because 61126263919 - 2¹³ = 61126255727 is a prime.

It is a super-2 number, since 2×61126263919² (a number of 22 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 (61126263959) 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, 1118997 + ... + 1172350.

It is an arithmetic number, because the mean of its divisors is an integer number (4527703648).

Almost surely, 2^61126263919 is an apocalyptic number.

61126263919 is the 142743-rd hex number.

61126263919 is a deficient number, since it is larger than the sum of its proper divisors (11316994449).

61126263919 is a wasteful number, since it uses less digits than its factorization.

61126263919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291494.

The product of its digits is 209952, while the sum is 46.

The spelling of 61126263919 in words is "sixty-one billion, one hundred twenty-six million, two hundred sixty-three thousand, nine hundred nineteen".