65016005155551 has 48 divisors (see below), whose sum is σ = 101078432851968. Its totient is φ = 40120797312000.

The previous prime is 65016005155529. The next prime is 65016005155561. The reversal of 65016005155551 is 15555150061056.

It is a de Polignac number, because none of the positive numbers 2^k-65016005155551 is a prime.

It is a super-2 number, since 2×65016005155551² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65016005155497 and 65016005155506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65016005155561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78423501 + ... + 79248201.

It is an arithmetic number, because the mean of its divisors is an integer number (2105800684416).

Almost surely, 2^{65016005155551} is an apocalyptic number.

65016005155551 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

65016005155551 is a deficient number, since it is larger than the sum of its proper divisors (36062427696417).

65016005155551 is a wasteful number, since it uses less digits than its factorization.

65016005155551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833232 (or 833229 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 65016005155551 in words is "sixty-five trillion, sixteen billion, five million, one hundred fifty-five thousand, five hundred fifty-one".