71861605442 has 32 divisors (see below), whose sum is σ = 120073022784. Its totient is φ = 31981651200.

The previous prime is 71861605433. The next prime is 71861605481. The reversal of 71861605442 is 24450616817.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 71861605393 and 71861605402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56717 + ... + 383327.

It is an arithmetic number, because the mean of its divisors is an integer number (3752281962).

Almost surely, 2^71861605442 is an apocalyptic number.

71861605442 is a deficient number, since it is larger than the sum of its proper divisors (48211417342).

71861605442 is a wasteful number, since it uses less digits than its factorization.

71861605442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326834.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 71861605442 in words is "seventy-one billion, eight hundred sixty-one million, six hundred five thousand, four hundred forty-two".