6156402780 has 192 divisors, whose sum is σ = 20021395968. Its totient is φ = 1396899840.

The previous prime is 6156402761. The next prime is 6156402841. The reversal of 6156402780 is 872046516.

6156402780 = T₂₆₉₀₄ + T₂₆₉₀₅ + ... + T₂₆₉₂₀.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2164039 + ... + 2166881.

It is an arithmetic number, because the mean of its divisors is an integer number (104278104).

Almost surely, 2^6156402780 is an apocalyptic number.

6156402780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6156402780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10010697984).

6156402780 is an abundant number, since it is smaller than the sum of its proper divisors (13864993188).

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

6156402780 is a wasteful number, since it uses less digits than its factorization.

6156402780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 6156402780 is about 78462.7477214506. The cubic root of 6156402780 is about 1832.7743936503.

The spelling of 6156402780 in words is "six billion, one hundred fifty-six million, four hundred two thousand, seven hundred eighty".