1561016151 has 16 divisors (see below), whose sum is σ = 2314443520. Its totient is φ = 1039855320.

The previous prime is 1561016131. The next prime is 1561016161. The reversal of 1561016151 is 1516101651.

It is not a de Polignac number, because 1561016151 - 2⁶ = 1561016087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561016111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12996 + ... + 57366.

It is an arithmetic number, because the mean of its divisors is an integer number (144652720).

Almost surely, 2^1561016151 is an apocalyptic number.

1561016151 is a deficient number, since it is larger than the sum of its proper divisors (753427369).

1561016151 is a wasteful number, since it uses less digits than its factorization.

1561016151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45683 (or 45677 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1561016151 is about 39509.6969236667. The cubic root of 1561016151 is about 1160.0297631583.

The spelling of 1561016151 in words is "one billion, five hundred sixty-one million, sixteen thousand, one hundred fifty-one".