2687557961087 has 4 divisors (see below), whose sum is σ = 2760194662776. Its totient is φ = 2614921259400.

The previous prime is 2687557961083. The next prime is 2687557961183. The reversal of 2687557961087 is 7801697557862.

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

It is a cyclic number.

It is not a de Polignac number, because 2687557961087 - 2² = 2687557961083 is a prime.

It is a super-2 number, since 2×2687557961087² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2687557961087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687557961083) 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, 36318350789 + ... + 36318350862.

It is an arithmetic number, because the mean of its divisors is an integer number (690048665694).

Almost surely, 2^{2687557961087} is an apocalyptic number.

2687557961087 is a deficient number, since it is larger than the sum of its proper divisors (72636701689).

2687557961087 is an equidigital number, since it uses as much as digits as its factorization.

2687557961087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72636701688.

The product of its (nonzero) digits is 355622400, while the sum is 71.

The spelling of 2687557961087 in words is "two trillion, six hundred eighty-seven billion, five hundred fifty-seven million, nine hundred sixty-one thousand, eighty-seven".