61028045551 has 4 divisors (see below), whose sum is σ = 66576049704. Its totient is φ = 55480041400.

The previous prime is 61028045503. The next prime is 61028045557. The reversal of 61028045551 is 15554082016.

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

It is a cyclic number.

It is not a de Polignac number, because 61028045551 - 2⁷ = 61028045423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61028045551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61028045557) 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, 2774002060 + ... + 2774002081.

It is an arithmetic number, because the mean of its divisors is an integer number (16644012426).

Almost surely, 2^61028045551 is an apocalyptic number.

61028045551 is a deficient number, since it is larger than the sum of its proper divisors (5548004153).

61028045551 is a wasteful number, since it uses less digits than its factorization.

61028045551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5548004152.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 61028045551 in words is "sixty-one billion, twenty-eight million, forty-five thousand, five hundred fifty-one".