1051561798 has 16 divisors (see below), whose sum is σ = 1832230944. Its totient is φ = 443280960.

The previous prime is 1051561787. The next prime is 1051561831. The reversal of 1051561798 is 8971651501.

It is a super-2 number, since 2×1051561798² = 2211564430025985608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614815 + ... + 616522.

It is an arithmetic number, because the mean of its divisors is an integer number (114514434).

Almost surely, 2^1051561798 is an apocalyptic number.

1051561798 is a deficient number, since it is larger than the sum of its proper divisors (780669146).

1051561798 is a wasteful number, since it uses less digits than its factorization.

1051561798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231407.

The product of its (nonzero) digits is 75600, while the sum is 43.

The square root of 1051561798 is about 32427.7936036358. The cubic root of 1051561798 is about 1016.9000455123.

The spelling of 1051561798 in words is "one billion, fifty-one million, five hundred sixty-one thousand, seven hundred ninety-eight".