61713290405 has 16 divisors (see below), whose sum is σ = 81697747824. Its totient is φ = 44461355520.

The previous prime is 61713290341. The next prime is 61713290437. The reversal of 61713290405 is 50409231716.

61713290405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1926683236 + 59786607169 = 43894^2 + 244513^2 .

It is not a de Polignac number, because 61713290405 - 2⁶ = 61713290341 is a prime.

It is a super-2 number, since 2×61713290405² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11575814 + ... + 11581143.

It is an arithmetic number, because the mean of its divisors is an integer number (5106109239).

Almost surely, 2^61713290405 is an apocalyptic number.

61713290405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61713290405 is a deficient number, since it is larger than the sum of its proper divisors (19984457419).

61713290405 is a wasteful number, since it uses less digits than its factorization.

61713290405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23157016.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 61713290405 in words is "sixty-one billion, seven hundred thirteen million, two hundred ninety thousand, four hundred five".