1057076621878 has 4 divisors (see below), whose sum is σ = 1585614932820. Its totient is φ = 528538310938.

The previous prime is 1057076621857. The next prime is 1057076621891. The reversal of 1057076621878 is 8781266707501.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1057076621878² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264269155468 + ... + 264269155471.

It is an arithmetic number, because the mean of its divisors is an integer number (396403733205).

Almost surely, 2^{1057076621878} is an apocalyptic number.

1057076621878 is a deficient number, since it is larger than the sum of its proper divisors (528538310942).

1057076621878 is an equidigital number, since it uses as much as digits as its factorization.

1057076621878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528538310941.

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 1057076621878 in words is "one trillion, fifty-seven billion, seventy-six million, six hundred twenty-one thousand, eight hundred seventy-eight".