61108597749 has 32 divisors (see below), whose sum is σ = 87073975296. Its totient is φ = 37987280640.

The previous prime is 61108597699. The next prime is 61108597769. The reversal of 61108597749 is 94779580116.

It is not a de Polignac number, because 61108597749 - 2¹³ = 61108589557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61108597769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2603034 + ... + 2626404.

It is an arithmetic number, because the mean of its divisors is an integer number (2721061728).

Almost surely, 2^61108597749 is an apocalyptic number.

It is an amenable number.

61108597749 is a deficient number, since it is larger than the sum of its proper divisors (25965377547).

61108597749 is a wasteful number, since it uses less digits than its factorization.

61108597749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23865.

The product of its (nonzero) digits is 3810240, while the sum is 57.

The spelling of 61108597749 in words is "sixty-one billion, one hundred eight million, five hundred ninety-seven thousand, seven hundred forty-nine".