1961479624537 has 4 divisors (see below), whose sum is σ = 1962159045376. Its totient is φ = 1960800203700.

The previous prime is 1961479624523. The next prime is 1961479624571. The reversal of 1961479624537 is 7354269741691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1961479624537 - 2¹¹ = 1961479622489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961479604537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339706089 + ... + 339711862.

It is an arithmetic number, because the mean of its divisors is an integer number (490539761344).

Almost surely, 2^{1961479624537} is an apocalyptic number.

It is an amenable number.

1961479624537 is a deficient number, since it is larger than the sum of its proper divisors (679420839).

1961479624537 is an equidigital number, since it uses as much as digits as its factorization.

1961479624537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679420838.

The product of its digits is 68584320, while the sum is 64.

The spelling of 1961479624537 in words is "one trillion, nine hundred sixty-one billion, four hundred seventy-nine million, six hundred twenty-four thousand, five hundred thirty-seven".