120651611156566 has 64 divisors (see below), whose sum is σ = 219115458777600. Its totient is φ = 48672765506304.

The previous prime is 120651611156539. The next prime is 120651611156567. The reversal of 120651611156566 is 665651116156021.

It is a super-2 number, since 2×120651611156566² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120651611156567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23556490 + ... + 28217218.

It is an arithmetic number, because the mean of its divisors is an integer number (3423679043400).

Almost surely, 2^{120651611156566} is an apocalyptic number.

120651611156566 is a deficient number, since it is larger than the sum of its proper divisors (98463847621034).

120651611156566 is a wasteful number, since it uses less digits than its factorization.

120651611156566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661381.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 120651611156566 in words is "one hundred twenty trillion, six hundred fifty-one billion, six hundred eleven million, one hundred fifty-six thousand, five hundred sixty-six".