61571565270 has 48 divisors (see below), whose sum is σ = 160114209840. Its totient is φ = 16416197952.

The previous prime is 61571565269. The next prime is 61571565323. The reversal of 61571565270 is 7256517516.

61571565270 is a `hidden beast` number, since 6 + 1 + 5 + 71 + 56 + 527 + 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 23 ways as a sum of consecutive naturals, for example, 481696 + ... + 595964.

It is an arithmetic number, because the mean of its divisors is an integer number (3335712705).

Almost surely, 2^61571565270 is an apocalyptic number.

61571565270 is an abundant number, since it is smaller than the sum of its proper divisors (98542644570).

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

61571565270 is a wasteful number, since it uses less digits than its factorization.

61571565270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120269 (or 120266 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 45.

The spelling of 61571565270 in words is "sixty-one billion, five hundred seventy-one million, five hundred sixty-five thousand, two hundred seventy".