1961514191751 has 8 divisors (see below), whose sum is σ = 2615360905584. Its totient is φ = 1307671802880.

The previous prime is 1961514191729. The next prime is 1961514191761. The reversal of 1961514191751 is 1571914151691.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1961514191751 - 2⁵ = 1961514191719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961514191694 and 1961514191703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961514191761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190791 + ... + 1989831.

It is an arithmetic number, because the mean of its divisors is an integer number (326920113198).

Almost surely, 2^{1961514191751} is an apocalyptic number.

1961514191751 is a deficient number, since it is larger than the sum of its proper divisors (653846713833).

1961514191751 is a wasteful number, since it uses less digits than its factorization.

1961514191751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162481.

The product of its digits is 340200, while the sum is 51.

The spelling of 1961514191751 in words is "one trillion, nine hundred sixty-one billion, five hundred fourteen million, one hundred ninety-one thousand, seven hundred fifty-one".