1056690651 has 4 divisors (see below), whose sum is σ = 1408920872. Its totient is φ = 704460432.

The previous prime is 1056690631. The next prime is 1056690667. The reversal of 1056690651 is 1560966501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1560966501 = 3 ⋅520322167.

It is not a de Polignac number, because 1056690651 - 2¹⁸ = 1056428507 is a prime.

It is a super-2 number, since 2×1056690651² = 2233190263821607602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056690611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176115106 + ... + 176115111.

It is an arithmetic number, because the mean of its divisors is an integer number (352230218).

Almost surely, 2^1056690651 is an apocalyptic number.

1056690651 is a deficient number, since it is larger than the sum of its proper divisors (352230221).

1056690651 is an equidigital number, since it uses as much as digits as its factorization.

1056690651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352230220.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 1056690651 is about 32506.7785392524. The cubic root of 1056690651 is about 1018.5506298805.

The spelling of 1056690651 in words is "one billion, fifty-six million, six hundred ninety thousand, six hundred fifty-one".