6401511402 has 64 divisors (see below), whose sum is σ = 15325220736. Its totient is φ = 1756834560.

The previous prime is 6401511397. The next prime is 6401511419. The reversal of 6401511402 is 2041151046.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24913 + ... + 115860.

It is an arithmetic number, because the mean of its divisors is an integer number (239456574).

Almost surely, 2^6401511402 is an apocalyptic number.

6401511402 is an abundant number, since it is smaller than the sum of its proper divisors (8923709334).

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

6401511402 is a wasteful number, since it uses less digits than its factorization.

6401511402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140855.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 6401511402 is about 80009.4457048666. The cubic root of 6401511402 is about 1856.7816741635.

Adding to 6401511402 its reverse (2041151046), we get a palindrome (8442662448).

The spelling of 6401511402 in words is "six billion, four hundred one million, five hundred eleven thousand, four hundred two".