61406042064786 has 96 divisors (see below), whose sum is σ = 145424266610688. Its totient is φ = 18642264514560.

The previous prime is 61406042064781. The next prime is 61406042064823. The reversal of 61406042064786 is 68746024060416.

It is a happy number.

61406042064786 is a `hidden beast` number, since 6 + 1 + 4 + 0 + 604 + 20 + 6 + 4 + 7 + 8 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (61406042064781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202023255 + ... + 202326981.

It is an arithmetic number, because the mean of its divisors is an integer number (1514836110528).

Almost surely, 2^{61406042064786} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61406042064786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72712133305344).

61406042064786 is an abundant number, since it is smaller than the sum of its proper divisors (84018224545902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61406042064786 is a wasteful number, since it uses less digits than its factorization.

61406042064786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325096 (or 325093 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 61406042064786 in words is "sixty-one trillion, four hundred six billion, forty-two million, sixty-four thousand, seven hundred eighty-six".