61406860415 has 32 divisors (see below), whose sum is σ = 78161780736. Its totient is φ = 46242938880.

The previous prime is 61406860357. The next prime is 61406860421. The reversal of 61406860415 is 51406860416.

61406860415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61406860415 - 2⁶ = 61406860351 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1161599 + ... + 1213311.

It is an arithmetic number, because the mean of its divisors is an integer number (2442555648).

Almost surely, 2^61406860415 is an apocalyptic number.

61406860415 is a deficient number, since it is larger than the sum of its proper divisors (16754920321).

61406860415 is a wasteful number, since it uses less digits than its factorization.

61406860415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51959.

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

Subtracting from 61406860415 its reverse (51406860416), we obtain a palindrome (9999999999).

The spelling of 61406860415 in words is "sixty-one billion, four hundred six million, eight hundred sixty thousand, four hundred fifteen".