61385332531 has 8 divisors (see below), whose sum is σ = 62714134784. Its totient is φ = 60068665800.

The previous prime is 61385332529. The next prime is 61385332543. The reversal of 61385332531 is 13523358316.

It is a happy number.

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 61385332531 - 2¹ = 61385332529 is a prime.

It is a super-2 number, since 2×61385332531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61385336531) 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, 3023655 + ... + 3043888.

It is an arithmetic number, because the mean of its divisors is an integer number (7839266848).

Almost surely, 2^61385332531 is an apocalyptic number.

61385332531 is a deficient number, since it is larger than the sum of its proper divisors (1328802253).

61385332531 is a wasteful number, since it uses less digits than its factorization.

61385332531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067761.

The product of its digits is 194400, while the sum is 40.

The spelling of 61385332531 in words is "sixty-one billion, three hundred eighty-five million, three hundred thirty-two thousand, five hundred thirty-one".