61299844149 has 16 divisors (see below), whose sum is σ = 84518188992. Its totient is φ = 39497048448.

The previous prime is 61299844063. The next prime is 61299844157. The reversal of 61299844149 is 94144899216.

It is a happy number.

It is not a de Polignac number, because 61299844149 - 2²¹ = 61297746997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61299844649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2866464 + ... + 2887769.

It is an arithmetic number, because the mean of its divisors is an integer number (5282386812).

Almost surely, 2^61299844149 is an apocalyptic number.

It is an amenable number.

61299844149 is a deficient number, since it is larger than the sum of its proper divisors (23218344843).

61299844149 is a wasteful number, since it uses less digits than its factorization.

61299844149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754356.

The product of its digits is 4478976, while the sum is 57.

The spelling of 61299844149 in words is "sixty-one billion, two hundred ninety-nine million, eight hundred forty-four thousand, one hundred forty-nine".