1051361078881 has 9 divisors (see below), whose sum is σ = 1056246866899. Its totient is φ = 1046497801144.

The previous prime is 1051361078861. The next prime is 1051361078893. The reversal of 1051361078881 is 1888701631501.

The square root of 1051361078881 is 1025359.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4185443025 + 1047175635856 = 64695^2 + 1023316^2 .

It is not a de Polignac number, because 1051361078881 - 2²³ = 1051352690273 is a prime.

It is a super-2 number, since 2×1051361078881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051361078861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 232754235 + ... + 232758751.

Almost surely, 2^{1051361078881} is an apocalyptic number.

1051361078881 is the 1025359-th square number.

1051361078881 is the 512680-th centered octagonal number.

It is an amenable number.

1051361078881 is a deficient number, since it is larger than the sum of its proper divisors (4885788018).

1051361078881 is an frugal number, since it uses more digits than its factorization.

1051361078881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488 (or 4744 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 49.

Multiplying 1051361078881 by its sum of digits (49), we get a square (51516692865169 = 7177513²).

The spelling of 1051361078881 in words is "one trillion, fifty-one billion, three hundred sixty-one million, seventy-eight thousand, eight hundred eighty-one".