61879139548 has 12 divisors (see below), whose sum is σ = 109360658232. Its totient is φ = 30633237200.

The previous prime is 61879139521. The next prime is 61879139591. The reversal of 61879139548 is 84593197816.

61879139548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61879139548² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76582690 + ... + 76583497.

It is an arithmetic number, because the mean of its divisors is an integer number (9113388186).

Almost surely, 2^61879139548 is an apocalyptic number.

It is an amenable number.

61879139548 is a deficient number, since it is larger than the sum of its proper divisors (47481518684).

61879139548 is a wasteful number, since it uses less digits than its factorization.

61879139548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153166292 (or 153166290 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The spelling of 61879139548 in words is "sixty-one billion, eight hundred seventy-nine million, one hundred thirty-nine thousand, five hundred forty-eight".