61570221394 has 32 divisors (see below), whose sum is σ = 104126238720. Its totient is φ = 27051142800.

The previous prime is 61570221379. The next prime is 61570221403. The reversal of 61570221394 is 49312207516.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518397 + ... + 625999.

It is an arithmetic number, because the mean of its divisors is an integer number (3253944960).

Almost surely, 2^61570221394 is an apocalyptic number.

61570221394 is a deficient number, since it is larger than the sum of its proper divisors (42556017326).

61570221394 is a wasteful number, since it uses less digits than its factorization.

61570221394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108486.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 61570221394 in words is "sixty-one billion, five hundred seventy million, two hundred twenty-one thousand, three hundred ninety-four".