1961021577954 has 32 divisors (see below), whose sum is σ = 3935384507520. Its totient is φ = 651451162752.

The previous prime is 1961021577913. The next prime is 1961021577989. The reversal of 1961021577954 is 4597751201691.

It is a super-2 number, since 2×1961021577954² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1961021577894 and 1961021577903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9222912 + ... + 9433140.

It is an arithmetic number, because the mean of its divisors is an integer number (122980765860).

Almost surely, 2^{1961021577954} is an apocalyptic number.

1961021577954 is an abundant number, since it is smaller than the sum of its proper divisors (1974362929566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961021577954 is a wasteful number, since it uses less digits than its factorization.

1961021577954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215514.

The product of its (nonzero) digits is 4762800, while the sum is 57.

The spelling of 1961021577954 in words is "one trillion, nine hundred sixty-one billion, twenty-one million, five hundred seventy-seven thousand, nine hundred fifty-four".