87902211220977 has 16 divisors (see below), whose sum is σ = 117235815143040. Its totient is φ = 58585043043072.

The previous prime is 87902211220877. The next prime is 87902211221003. The reversal of 87902211220977 is 77902211220978.

It is a happy number.

It is not a de Polignac number, because 87902211220977 - 2¹¹ = 87902211218929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87902211220777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155144233 + ... + 155709785.

It is an arithmetic number, because the mean of its divisors is an integer number (7327238446440).

Almost surely, 2^{87902211220977} is an apocalyptic number.

It is an amenable number.

87902211220977 is a deficient number, since it is larger than the sum of its proper divisors (29333603922063).

87902211220977 is a wasteful number, since it uses less digits than its factorization.

87902211220977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579992.

The product of its (nonzero) digits is 3556224, while the sum is 57.

Subtracting from 87902211220977 its reverse (77902211220978), we obtain a palindrome (9999999999999).

The spelling of 87902211220977 in words is "eighty-seven trillion, nine hundred two billion, two hundred eleven million, two hundred twenty thousand, nine hundred seventy-seven".