61555545270 has 64 divisors (see below), whose sum is σ = 164176634880. Its totient is φ = 16411960800.

The previous prime is 61555545269. The next prime is 61555545353. The reversal of 61555545270 is 7254555516.

61555545270 is a `hidden beast` number, since 615 + 5 + 5 + 5 + 4 + 5 + 27 + 0 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1871265 + ... + 1903875.

It is an arithmetic number, because the mean of its divisors is an integer number (2565259920).

Almost surely, 2^61555545270 is an apocalyptic number.

61555545270 is an abundant number, since it is smaller than the sum of its proper divisors (102621089610).

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

61555545270 is a wasteful number, since it uses less digits than its factorization.

61555545270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39618 (or 39612 counting only the distinct ones).

The product of its (nonzero) digits is 1050000, while the sum is 45.

The spelling of 61555545270 in words is "sixty-one billion, five hundred fifty-five million, five hundred forty-five thousand, two hundred seventy".