1561010601 has 8 divisors (see below), whose sum is σ = 2203779744. Its totient is φ = 979457600.

The previous prime is 1561010599. The next prime is 1561010609. The reversal of 1561010601 is 1060101651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1561010601 - 2¹ = 1561010599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561010609) 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, 15303975 + ... + 15304076.

It is an arithmetic number, because the mean of its divisors is an integer number (275472468).

Almost surely, 2^1561010601 is an apocalyptic number.

It is an amenable number.

1561010601 is a deficient number, since it is larger than the sum of its proper divisors (642769143).

1561010601 is a wasteful number, since it uses less digits than its factorization.

1561010601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30608071.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1561010601 is about 39509.6266876821. The cubic root of 1561010601 is about 1160.0283883758.

The spelling of 1561010601 in words is "one billion, five hundred sixty-one million, ten thousand, six hundred one".