61026250878 has 128 divisors (see below), whose sum is σ = 141302599680. Its totient is φ = 19502208000.

The previous prime is 61026250861. The next prime is 61026250903. The reversal of 61026250878 is 87805262016.

61026250878 is a `hidden beast` number, since 6 + 10 + 2 + 62 + 508 + 78 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133536426 + ... + 133536882.

It is an arithmetic number, because the mean of its divisors is an integer number (1103926560).

Almost surely, 2^61026250878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61026250878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70651299840).

61026250878 is an abundant number, since it is smaller than the sum of its proper divisors (80276348802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61026250878 is a wasteful number, since it uses less digits than its factorization.

61026250878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 61026250878 in words is "sixty-one billion, twenty-six million, two hundred fifty thousand, eight hundred seventy-eight".