1972796511081 has 32 divisors (see below), whose sum is σ = 3045534892416. Its totient is φ = 1122629760000.

The previous prime is 1972796511079. The next prime is 1972796511131. The reversal of 1972796511081 is 1801156972791.

It is not a de Polignac number, because 1972796511081 - 2¹ = 1972796511079 is a prime.

It is a super-3 number, since 3×1972796511081³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1972796511281) 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, 3940270 + ... + 4412631.

It is an arithmetic number, because the mean of its divisors is an integer number (95172965388).

Almost surely, 2^{1972796511081} is an apocalyptic number.

1972796511081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1972796511081 is a deficient number, since it is larger than the sum of its proper divisors (1072738381335).

1972796511081 is a wasteful number, since it uses less digits than its factorization.

1972796511081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353353.

The product of its (nonzero) digits is 1905120, while the sum is 57.

The spelling of 1972796511081 in words is "one trillion, nine hundred seventy-two billion, seven hundred ninety-six million, five hundred eleven thousand, eighty-one".