61361262003991 has 8 divisors (see below), whose sum is σ = 61658525111040. Its totient is φ = 61064235293688.

The previous prime is 61361262003971. The next prime is 61361262004033. The reversal of 61361262003991 is 19930026216316.

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

It is a cyclic number.

It is not a de Polignac number, because 61361262003991 - 2²³ = 61361253615383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61361262003971) 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, 58578781 + ... + 59617078.

It is an arithmetic number, because the mean of its divisors is an integer number (7707315638880).

Almost surely, 2^{61361262003991} is an apocalyptic number.

61361262003991 is a deficient number, since it is larger than the sum of its proper divisors (297263107049).

61361262003991 is a wasteful number, since it uses less digits than its factorization.

61361262003991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118198373.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 61361262003991 in words is "sixty-one trillion, three hundred sixty-one billion, two hundred sixty-two million, three thousand, nine hundred ninety-one".