61954000791 has 8 divisors (see below), whose sum is σ = 82606842240. Its totient is φ = 41301913272.

The previous prime is 61954000789. The next prime is 61954000811. The reversal of 61954000791 is 19700045916.

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

It is not a de Polignac number, because 61954000791 - 2¹ = 61954000789 is a prime.

It is a super-2 number, since 2×61954000791² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61954000721) 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, 44350 + ... + 354788.

It is an arithmetic number, because the mean of its divisors is an integer number (10325855280).

Almost surely, 2^61954000791 is an apocalyptic number.

61954000791 is the 133046-th nonagonal number.

61954000791 is a deficient number, since it is larger than the sum of its proper divisors (20652841449).

61954000791 is a wasteful number, since it uses less digits than its factorization.

61954000791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376965.

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 61954000791 in words is "sixty-one billion, nine hundred fifty-four million, seven hundred ninety-one", and thus it is an aban number.