61975945090 has 16 divisors (see below), whose sum is σ = 112117291200. Its totient is φ = 24665802480.

The previous prime is 61975945081. The next prime is 61975945103. The reversal of 61975945090 is 9054957916.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15569856 + ... + 15573835.

It is an arithmetic number, because the mean of its divisors is an integer number (7007330700).

Almost surely, 2^61975945090 is an apocalyptic number.

61975945090 is a deficient number, since it is larger than the sum of its proper divisors (50141346110).

61975945090 is a wasteful number, since it uses less digits than its factorization.

61975945090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31143897.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 61975945090 in words is "sixty-one billion, nine hundred seventy-five million, nine hundred forty-five thousand, ninety".