1561450151 has 8 divisors (see below), whose sum is σ = 1632012000. Its totient is φ = 1491111072.

The previous prime is 1561450073. The next prime is 1561450157. The reversal of 1561450151 is 1510541651.

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 1561450151 - 2¹⁴ = 1561433767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561450157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41276 + ... + 69473.

It is an arithmetic number, because the mean of its divisors is an integer number (204001500).

Almost surely, 2^1561450151 is an apocalyptic number.

1561450151 is a deficient number, since it is larger than the sum of its proper divisors (70561849).

1561450151 is a wasteful number, since it uses less digits than its factorization.

1561450151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111385.

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 1561450151 is about 39515.1888645366. The cubic root of 1561450151 is about 1160.1372585797.

The spelling of 1561450151 in words is "one billion, five hundred sixty-one million, four hundred fifty thousand, one hundred fifty-one".