61687254415039 has 20 divisors (see below), whose sum is σ = 67966262635480. Its totient is φ = 55987830653040.

The previous prime is 61687254415001. The next prime is 61687254415091. The reversal of 61687254415039 is 93051445278616.

It is not a de Polignac number, because 61687254415039 - 2¹³ = 61687254406847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61687254410039) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5538292 + ... + 12411574.

It is an arithmetic number, because the mean of its divisors is an integer number (3398313131774).

It is a 1-persistent number, because it is pandigital, but 2⋅61687254415039 = 123374508830078 is not.

Almost surely, 2^{61687254415039} is an apocalyptic number.

61687254415039 is a deficient number, since it is larger than the sum of its proper divisors (6279008220441).

61687254415039 is an frugal number, since it uses more digits than its factorization.

61687254415039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6873940 (or 6873907 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 61687254415039 in words is "sixty-one trillion, six hundred eighty-seven billion, two hundred fifty-four million, four hundred fifteen thousand, thirty-nine".