61047542238 has 32 divisors (see below), whose sum is σ = 126095564160. Its totient is φ = 19688580000.

The previous prime is 61047542191. The next prime is 61047542273. The reversal of 61047542238 is 83224574016.

It is a self number, because there is not a number n which added to its sum of digits gives 61047542238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728388 + ... + 807863.

It is an arithmetic number, because the mean of its divisors is an integer number (3940486380).

Almost surely, 2^61047542238 is an apocalyptic number.

61047542238 is an abundant number, since it is smaller than the sum of its proper divisors (65048021922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61047542238 is a wasteful number, since it uses less digits than its factorization.

61047542238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536472.

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 61047542238 in words is "sixty-one billion, forty-seven million, five hundred forty-two thousand, two hundred thirty-eight".