21516151120498 has 16 divisors (see below), whose sum is σ = 35449951504320. Its totient is φ = 9748736662896.

The previous prime is 21516151120489. The next prime is 21516151120523. The reversal of 21516151120498 is 89402115161512.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 12309010065 + ... + 12309011812.

It is an arithmetic number, because the mean of its divisors is an integer number (2215621969020).

Almost surely, 2^{21516151120498} is an apocalyptic number.

21516151120498 is a deficient number, since it is larger than the sum of its proper divisors (13933800383822).

21516151120498 is a wasteful number, since it uses less digits than its factorization.

21516151120498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24618021921.

The product of its (nonzero) digits is 172800, while the sum is 46.

The spelling of 21516151120498 in words is "twenty-one trillion, five hundred sixteen billion, one hundred fifty-one million, one hundred twenty thousand, four hundred ninety-eight".