55215644515402 has 16 divisors (see below), whose sum is σ = 94655795873472. Its totient is φ = 23663746330560.

The previous prime is 55215644515333. The next prime is 55215644515513. The reversal of 55215644515402 is 20451544651255.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5008468 + ... + 11641135.

It is an arithmetic number, because the mean of its divisors is an integer number (5915987242092).

Almost surely, 2^{55215644515402} is an apocalyptic number.

55215644515402 is a deficient number, since it is larger than the sum of its proper divisors (39440151358070).

55215644515402 is a wasteful number, since it uses less digits than its factorization.

55215644515402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16886493.

The product of its (nonzero) digits is 4800000, while the sum is 49.

The spelling of 55215644515402 in words is "fifty-five trillion, two hundred fifteen billion, six hundred forty-four million, five hundred fifteen thousand, four hundred two".