1561036051 has 8 divisors (see below), whose sum is σ = 1599081984. Its totient is φ = 1523191560.

The previous prime is 1561036049. The next prime is 1561036073. The reversal of 1561036051 is 1506301651.

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 1561036051 - 2¹ = 1561036049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561036021) 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, 34615 + ... + 65728.

It is an arithmetic number, because the mean of its divisors is an integer number (199885248).

Almost surely, 2^1561036051 is an apocalyptic number.

1561036051 is a deficient number, since it is larger than the sum of its proper divisors (38045933).

1561036051 is a wasteful number, since it uses less digits than its factorization.

1561036051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100721.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1561036051 is about 39509.9487597744. The cubic root of 1561036051 is about 1160.0346925316.

The spelling of 1561036051 in words is "one billion, five hundred sixty-one million, thirty-six thousand, fifty-one".