61148758558 has 4 divisors (see below), whose sum is σ = 91723137840. Its totient is φ = 30574379278.

The previous prime is 61148758543. The next prime is 61148758589. The reversal of 61148758558 is 85585784116.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15287189638 + ... + 15287189641.

It is an arithmetic number, because the mean of its divisors is an integer number (22930784460).

Almost surely, 2^61148758558 is an apocalyptic number.

61148758558 is a deficient number, since it is larger than the sum of its proper divisors (30574379282).

61148758558 is a wasteful number, since it uses less digits than its factorization.

61148758558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30574379281.

The product of its digits is 10752000, while the sum is 58.

The spelling of 61148758558 in words is "sixty-one billion, one hundred forty-eight million, seven hundred fifty-eight thousand, five hundred fifty-eight".