61834357813 has 4 divisors (see below), whose sum is σ = 62434691488. Its totient is φ = 61234024140.

The previous prime is 61834357811. The next prime is 61834357847. The reversal of 61834357813 is 31875343816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61834357813 - 2¹ = 61834357811 is a prime.

It is a super-2 number, since 2×61834357813² (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 (61834357811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300166683 + ... + 300166888.

It is an arithmetic number, because the mean of its divisors is an integer number (15608672872).

Almost surely, 2^61834357813 is an apocalyptic number.

It is an amenable number.

61834357813 is a deficient number, since it is larger than the sum of its proper divisors (600333675).

61834357813 is a wasteful number, since it uses less digits than its factorization.

61834357813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600333674.

The product of its digits is 1451520, while the sum is 49.

The spelling of 61834357813 in words is "sixty-one billion, eight hundred thirty-four million, three hundred fifty-seven thousand, eight hundred thirteen".