61009191439 has 8 divisors (see below), whose sum is σ = 73826248608. Its totient is φ = 49217498880.

The previous prime is 61009191427. The next prime is 61009191461. The reversal of 61009191439 is 93419190016.

61009191439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61009191439 - 2³¹ = 58861707791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61009191395 and 61009191404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61009191499) 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, 256341022 + ... + 256341259.

It is an arithmetic number, because the mean of its divisors is an integer number (9228281076).

Almost surely, 2^61009191439 is an apocalyptic number.

61009191439 is a deficient number, since it is larger than the sum of its proper divisors (12817057169).

61009191439 is a wasteful number, since it uses less digits than its factorization.

61009191439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512682305.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 61009191439 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred thirty-nine".