61705573830 has 48 divisors (see below), whose sum is σ = 163461570480. Its totient is φ = 16144350144.

The previous prime is 61705573817. The next prime is 61705573859. The reversal of 61705573830 is 3837550716.

61705573830 is a `hidden beast` number, since 6 + 1 + 70 + 5 + 573 + 8 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6463320 + ... + 6472859.

It is an arithmetic number, because the mean of its divisors is an integer number (3405449385).

Almost surely, 2^61705573830 is an apocalyptic number.

61705573830 is an abundant number, since it is smaller than the sum of its proper divisors (101755996650).

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

61705573830 is a wasteful number, since it uses less digits than its factorization.

61705573830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936245 (or 12936242 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 61705573830 in words is "sixty-one billion, seven hundred five million, five hundred seventy-three thousand, eight hundred thirty".