1057985651 has 8 divisors (see below), whose sum is σ = 1088389440. Its totient is φ = 1027910848.

The previous prime is 1057985641. The next prime is 1057985653. The reversal of 1057985651 is 1565897501.

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 1057985651 - 2⁶ = 1057985587 is a prime.

It is a super-2 number, since 2×1057985651² = 2238667275443787602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1057985596 and 1057985605.

It is not an unprimeable number, because it can be changed into a prime (1057985653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75716 + ... + 88593.

It is an arithmetic number, because the mean of its divisors is an integer number (136048680).

Almost surely, 2^1057985651 is an apocalyptic number.

1057985651 is a deficient number, since it is larger than the sum of its proper divisors (30403789).

1057985651 is a wasteful number, since it uses less digits than its factorization.

1057985651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164493.

The product of its (nonzero) digits is 378000, while the sum is 47.

The square root of 1057985651 is about 32526.6913626332. The cubic root of 1057985651 is about 1018.9665461815.

The spelling of 1057985651 in words is "one billion, fifty-seven million, nine hundred eighty-five thousand, six hundred fifty-one".