61381124428 has 24 divisors (see below), whose sum is σ = 115757647040. Its totient is φ = 28310688000.

The previous prime is 61381124411. The next prime is 61381124429. The reversal of 61381124428 is 82442118316.

It is not an unprimeable number, because it can be changed into a prime (61381124429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318948 + ... + 473803.

Almost surely, 2^61381124428 is an apocalyptic number.

It is an amenable number.

61381124428 is a deficient number, since it is larger than the sum of its proper divisors (54376522612).

61381124428 is a wasteful number, since it uses less digits than its factorization.

61381124428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794257 (or 794255 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The spelling of 61381124428 in words is "sixty-one billion, three hundred eighty-one million, one hundred twenty-four thousand, four hundred twenty-eight".