1277157761157 has 8 divisors (see below), whose sum is σ = 1704981934080. Its totient is φ = 850386047840.

The previous prime is 1277157761141. The next prime is 1277157761213. The reversal of 1277157761157 is 7511677517721.

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 1277157761157 - 2⁴ = 1277157761141 is a prime.

It is a super-2 number, since 2×1277157761157² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1277157761097 and 1277157761106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277157761557) 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, 263112069 + ... + 263116922.

It is an arithmetic number, because the mean of its divisors is an integer number (213122741760).

Almost surely, 2^{1277157761157} is an apocalyptic number.

It is an amenable number.

1277157761157 is a deficient number, since it is larger than the sum of its proper divisors (427824172923).

1277157761157 is an equidigital number, since it uses as much as digits as its factorization.

1277157761157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526229803.

The product of its digits is 5042100, while the sum is 57.

The spelling of 1277157761157 in words is "one trillion, two hundred seventy-seven billion, one hundred fifty-seven million, seven hundred sixty-one thousand, one hundred fifty-seven".