61005706356 has 24 divisors (see below), whose sum is σ = 162681883840. Its totient is φ = 17430201792.

The previous prime is 61005706343. The next prime is 61005706381. The reversal of 61005706356 is 65360750016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363129121 + ... + 363129288.

Almost surely, 2^61005706356 is an apocalyptic number.

It is an amenable number.

61005706356 is an abundant number, since it is smaller than the sum of its proper divisors (101676177484).

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

61005706356 is a wasteful number, since it uses less digits than its factorization.

61005706356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726258423 (or 726258421 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 61005706356 in words is "sixty-one billion, five million, seven hundred six thousand, three hundred fifty-six".