61826415431 has 16 divisors (see below), whose sum is σ = 68091975168. Its totient is φ = 56133463320.

The previous prime is 61826415419. The next prime is 61826415433. The reversal of 61826415431 is 13451462816.

61826415431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61826415431 is a prime.

It is a super-2 number, since 2×61826415431² (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 (61826415433) 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, 1017986 + ... + 1077008.

It is an arithmetic number, because the mean of its divisors is an integer number (4255748448).

Almost surely, 2^61826415431 is an apocalyptic number.

61826415431 is a deficient number, since it is larger than the sum of its proper divisors (6265559737).

61826415431 is an equidigital number, since it uses as much as digits as its factorization.

61826415431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59843 (or 59821 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The spelling of 61826415431 in words is "sixty-one billion, eight hundred twenty-six million, four hundred fifteen thousand, four hundred thirty-one".