61149767953 has 4 divisors (see below), whose sum is σ = 61154629488. Its totient is φ = 61144906420.

The previous prime is 61149767933. The next prime is 61149767977. The reversal of 61149767953 is 35976794116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61149767953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61149767933) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2411851 + ... + 2437072.

It is an arithmetic number, because the mean of its divisors is an integer number (15288657372).

Almost surely, 2^61149767953 is an apocalyptic number.

It is an amenable number.

61149767953 is a deficient number, since it is larger than the sum of its proper divisors (4861535).

61149767953 is a wasteful number, since it uses less digits than its factorization.

61149767953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861534.

The product of its digits is 8573040, while the sum is 58.

The spelling of 61149767953 in words is "sixty-one billion, one hundred forty-nine million, seven hundred sixty-seven thousand, nine hundred fifty-three".