61047049723 has 32 divisors (see below), whose sum is σ = 71042400000. Its totient is φ = 51873592320.

The previous prime is 61047049699. The next prime is 61047049729. The reversal of 61047049723 is 32794074016.

It is a de Polignac number, because none of the positive numbers 2^k-61047049723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61047049723.

It is not an unprimeable number, because it can be changed into a prime (61047049729) 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, 9278611 + ... + 9285187.

It is an arithmetic number, because the mean of its divisors is an integer number (2220075000).

Almost surely, 2^61047049723 is an apocalyptic number.

61047049723 is a deficient number, since it is larger than the sum of its proper divisors (9995350277).

61047049723 is a wasteful number, since it uses less digits than its factorization.

61047049723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 61047049723 in words is "sixty-one billion, forty-seven million, forty-nine thousand, seven hundred twenty-three".