61005151568 has 10 divisors (see below), whose sum is σ = 118197481194. Its totient is φ = 30502575776.

The previous prime is 61005151567. The next prime is 61005151583. The reversal of 61005151568 is 86515150016.

It can be written as a sum of positive squares in only one way, i.e., 59266928704 + 1738222864 = 243448^2 + 41692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005151567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906410971 + ... + 1906411002.

Almost surely, 2^61005151568 is an apocalyptic number.

It is an amenable number.

61005151568 is a deficient number, since it is larger than the sum of its proper divisors (57192329626).

61005151568 is a wasteful number, since it uses less digits than its factorization.

61005151568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812821981 (or 3812821975 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 61005151568 in words is "sixty-one billion, five million, one hundred fifty-one thousand, five hundred sixty-eight".