61027629391 has 4 divisors (see below), whose sum is σ = 61033694400. Its totient is φ = 61021564384.

The previous prime is 61027629373. The next prime is 61027629409. The reversal of 61027629391 is 19392672016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61027629373) and next prime (61027629409).

It is a cyclic number.

It is not a de Polignac number, because 61027629391 - 2⁵ = 61027629359 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 (61027629361) 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, 3017386 + ... + 3037543.

It is an arithmetic number, because the mean of its divisors is an integer number (15258423600).

Almost surely, 2^61027629391 is an apocalyptic number.

61027629391 is a deficient number, since it is larger than the sum of its proper divisors (6065009).

61027629391 is a wasteful number, since it uses less digits than its factorization.

61027629391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065008.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 61027629391 in words is "sixty-one billion, twenty-seven million, six hundred twenty-nine thousand, three hundred ninety-one".