1257461937161 has 4 divisors (see below), whose sum is σ = 1323644144400. Its totient is φ = 1191279729924.

The previous prime is 1257461937119. The next prime is 1257461937181. The reversal of 1257461937161 is 1617391647521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1257461937161 - 2¹⁸ = 1257461675017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257461937181) 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, 33091103591 + ... + 33091103628.

It is an arithmetic number, because the mean of its divisors is an integer number (330911036100).

Almost surely, 2^{1257461937161} is an apocalyptic number.

It is an amenable number.

1257461937161 is a deficient number, since it is larger than the sum of its proper divisors (66182207239).

1257461937161 is an equidigital number, since it uses as much as digits as its factorization.

1257461937161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66182207238.

The product of its digits is 1905120, while the sum is 53.

The spelling of 1257461937161 in words is "one trillion, two hundred fifty-seven billion, four hundred sixty-one million, nine hundred thirty-seven thousand, one hundred sixty-one".